Victorino Chua was a staff nurse on the night shift at Stepping Hill Hospital in Stockport, on the southern edge of Greater Manchester. In late June and July 2011 he used a syringe to put insulin into bags and ampoules of saline, the salt solution given through drips and used to flush lines and dilute drugs. He left them in the ward treatment rooms with the rest of the stock. Other nurses, who had no reason to suspect anything, took them and gave them to patients. Insulin lowers blood sugar, and in a patient who does not need it, it can cause collapse, coma, brain damage and death.
Two patients died as a result: Tracey Arden, 44, and Derek Weaver, 83. A 41-year-old man was left with permanent brain damage. Many more, most of them elderly or seriously ill, suffered sudden attacks of low blood sugar, and some of them more than once. When the hospital tightened its controls, Chua turned in January 2012 to altering patients' prescription charts so they would be given larger doses of heart drugs. He was caught when that was noticed, and his conviction in May 2015 ended an inquiry that Greater Manchester Police called one of the most complex its senior detectives had ever handled. Along the way an innocent nurse spent six weeks in prison.
The trial judge, Mr Justice Openshaw, said that nothing in the evidence explained why Chua did it. Chua has always denied it.
Chua was born in the Philippines in 1965 or early 1966; he was 46 when he was arrested and 49 when he was sentenced. He trained, or said he trained, as a nurse in Manila. According to Channel 4 News and the Stockport Express, both reporting police inquiries made for the trial, he first enrolled on a course at the Metropolitan Medical Centre in Manila. Channel 4 reported that he was removed from that course for selling prescription forms to patients; the Stockport Express said he left because he could not afford the fees. He then moved to Galang, a training hospital and college in Manila that later closed, and claimed to have graduated there in 1989. He worked as a nurse in Manila through the 1990s, and the Stockport Express reported that he was dismissed from one hospital after being caught stealing prescription drugs.
He came to Britain in 2002 on a two-year work permit, later extended, and brought his wife and elder daughter with him. A second daughter was born in Stockport in 2005, and he later became a naturalized British citizen. He worked first in care homes in Warrington and Stockport. At Newlands Care Home in Stockport he was disciplined after a dispute with colleagues, and it later emerged that he had embellished a testimonial he submitted at that disciplinary hearing; he left the home under a cloud, the Stockport Express reported. He then joined Stepping Hill Hospital as a staff nurse, in a year the reports do not give.
By 2011 he regularly worked nights on two acute medical wards, A1 and A3, where many patients were elderly, frail or seriously ill.
Questions about how Chua became a nurse came out only after his conviction. Greater Manchester Police detectives traveled to Manila. They visited the defunct Galang college and found three different versions of his school record: one without a photograph, one with an unclear photograph and one with a good one, two signed by one registrar and the third with a different signature. A certificate showing that he had passed a competency examination about a year into his career carried a photograph that did not appear to be of him, and police suspected that someone else had sat the test. Detective Superintendent Simon Barraclough, who led the inquiry, said the investigators had "absolutely no confidence" that the certificates were genuine.
Chua had joined the register of the Nursing and Midwifery Council (NMC), the UK nursing regulator, in 2002, when overseas applicants could send photocopies of their documents. An NMC spokesperson called that system "far from ideal," and the council said it had since moved to original documents, a face-to-face interview and a two-stage competence test. The NMC also said it had not been shown evidence that his documents were fraudulent. After the case it checked about 11,500 records of Filipino-trained nurses on its register; its chief executive, Jackie Smith, said, "We checked every single record." Police wrote to four government departments, including the Department of Health and the Foreign Office, warning of "significant opportunities for fraud" in the qualification process for nurses trained in the Philippines.
Stepping Hill's director of nursing, Judith Morris, said Chua's recruitment had followed NHS policy, with a check of the NMC register, a formal interview, two references, a criminal records check, passport and birth certificate checks and occupational health clearance.
Most patients on the two wards were given saline, either from bags hung on drips or from small plastic ampoules. Both were kept in treatment rooms that every nurse on the ward could use, and insulin was kept in the same rooms. Chua made a small slit in the outer packaging of a saline bag, just above the rubber seal, and injected insulin through it with a syringe. He also pierced ampoules. Insulin is colorless, so a bag or ampoule that had been tampered with looked normal.
The method meant that Chua did not have to treat the victims himself. A contaminated bag might be picked up by any nurse for any patient who needed a drip. The judge called this random selection a striking and "truly wicked" feature of the case, adding that it was "as if he left it to fate to determine who would be the victim." For a few patients, though, the judge concluded that Chua had chosen the target himself.
Insulin given to a person who does not need it causes hypoglycemia, a sharp fall in blood sugar. Elderly, frail and seriously ill patients are least able to withstand it, and the judge found that Chua, as an experienced nurse, knew that.
The sentencing remarks list each patient by count, with dates from June 27, 2011, onward. On June 27 and 28, several patients on the wards had episodes of low blood sugar, some of them twice. One of them was Linda McDonagh, who had motor neurone disease; another was Jack Beeley, a man with bowel cancer and learning difficulties, for whom the judge found Chua had hung an unprescribed saline bag, he inferred, to quiet a patient Chua found troublesome. Afterward Mr Beeley's family saw a lasting change in his personality.
Beryl Hope, 70, had cancer of the esophagus. A retired nurse in the next bed had raised concerns with Chua, who reacted angrily, and the judge concluded that Chua took his anger out on Mrs Hope. She was poisoned while Chua's own notes recorded that all was well. She survived the episode and died of her cancer a couple of months later.
Into early July the poisonings continued. Patients aged from their late forties to their late eighties were affected. Kathleen Murray, who had been admitted with labyrinthitis, an inner ear condition, later told ITV's Good Morning Britain that she woke up "shaking uncontrollably" on a night when Chua was the nurse on her ward. In another case the laboratory found what the judge called "astronomically high" insulin levels. Mary Cartwright, 88, a pensioner from Derbyshire, was poisoned on July 9; tests confirmed insulin in her blood. She has since died. Her daughter, Judi Jones, said after the verdict that the family was very happy with it and hoped lessons would be learned.
Linda McDonagh, Jack Beeley and Beryl Hope were among seven people whose deaths police were examining in 2012. Chua was never charged with causing any of those deaths.
Tracey Arden was 44 and lived in Heaviley, Stockport. She was a mother of two and a grandmother. For twelve years she had lived with a progressive illness, described in the press as multiple sclerosis and by the judge as a degenerative condition like it, and by 2011 she lived in a care home and was severely disabled. She was admitted to Stepping Hill on July 6, 2011, for observation after a mild chest infection.
She was given saline from a contaminated ampoule and fell into severe hypoglycemia that lasted for nearly eight hours. It caused brain damage and starved her body of oxygen. Her parents, Keith and June, visited her on the afternoon of July 7, and her brother Gary said color had been coming back into her cheeks and that she had seemed to be responding to treatment. The hospital called the family back later that day. She died on July 7. Her funeral, planned for July 18, had to be postponed because of the police inquiry.
Her mother told the court in a statement that Tracey had battled her illness for twelve years and was still fighting it. "It should have been her choice to stop and die peacefully and naturally," she said. After the sentence her brother said what mattered was that Chua could not do this to anyone else.
Alfred Derek Weaver, known as Derek, was 83 and lived in Stockport. He had chronic obstructive pulmonary disease and heart failure, and was brought into Stepping Hill from an interim care home with breathing problems on July 10, 2011. The next day, July 11, he was found to be suffering from insulin poisoning. He slipped into unconsciousness and died on July 21. The medical evidence at trial was that the hypoglycemia had made a significant contribution to his death.
His sister, Lynda Bleasdale, said in the days after he died that he was "such a wonderful person" who had never once complained. The judge quoted her description of "the indescribable pain" he suffered. After the sentence his sister Lynda said the family was delighted, and that she believed Chua had enjoyed seeing people suffer.
The night of July 10 to 11 was the worst of the series. Five patients were poisoned in that one night shift, and Chua was the only staff member on duty near all of them.
Grant Misell, 41, a former accountant, had been admitted on July 10 after an overdose. At 4:34 that morning Chua carried out blood sugar tests on every patient in Mr Misell's bay, tests the judge said had no medical justification. Mr Misell fell into a coma from which he could not be roused, and suffered severe and permanent brain damage. Chua's own entries in his records at 6 and 7 a.m. were untrue. Mr Misell made a slow and incomplete recovery and lost his career; the judge said the poisoning had taken away his self-esteem as well.
Arnold Lancaster, 71, of Romiley, had terminal cancer of the esophagus. He was poisoned on July 11 and died later that day. William Dickson, 82, who had chronic lung disease, collapsed with severe hypoglycemia in the early hours of July 11, and it was his wife who raised the alarm.
On July 11 a nurse noticed that a saline ampoule looked foamy, "like washing up liquid," when it should have been clear. On July 12 staff raised the alarm after more patients than normal had unexplained low blood sugar. Searches of the stock found 45 ampoules that had been pierced with a hypodermic needle; 19 of them contained insulin. Early press reports in July 2011 spoke of a batch of 36 contaminated ampoules in a storeroom near ward A1.
Police found more. One glucose bag out of 77 was contaminated, as were a saline bag and a bottle of the intravenous antibiotic metronidazole. One saline bag contained lidocaine, a local anesthetic. These were charged as attempts to cause grievous bodily harm, or in the lidocaine case as an attempt to administer poison, because they had not reached a patient.
The hospital locked its insulin fridges and introduced stock controls, and the judge found that these measures ended the first series of poisonings. Patients were still harmed in the days that followed. D.H., 86, suffered dangerously low blood sugar on July 12. Z.A., 24, who had been admitted on July 13 with gastroenteritis, was given a saline bag that two nurses had checked for leaks without finding any. It was contaminated, and the judge said that had it run for its full eight hours it could have caused irreversible brain damage or death. Police later dated the contamination period from June 1 to July 15, 2011.
Greater Manchester Police opened a murder inquiry. Stepping Hill became a crime scene, more than 60 detectives were assigned, and ambulances were diverted. The hospital's chief executive, Dr Chris Burke, called it "a criminal act, perpetrated by someone with malicious intent." Police warned that the person responsible might still be on the site. New rules required that no one give an intravenous drip alone and that every key to a medicine cabinet be signed for.
In 2015 the chief constable, Sir Peter Fahy, said police had come close to closing the hospital at the start of the inquiry, but that moving frail patients elsewhere could itself have caused deaths.
The scale of the inquiry grew over the following months. The South Manchester coroner, John Pollard, opened and adjourned inquests into the first deaths on July 19, 2011, and referred other deaths to the police. Two deaths first linked to the inquiry, of George Keep and Vera Pearson, both 84, were ruled out within weeks. By early September 2011 police were looking at seven deaths and up to 40 possible victims, and said more than 700 people could have had access to the wards in the relevant period. In October they put the number of patients poisoned at 17, with 16 cases eliminated and nine still under investigation. By December 2011 police said 19 people had been unlawfully given insulin, 21 patients had been ruled out, and in two cases the cause of low blood sugar could not be determined.
The early investigation had no confession and no camera. The assistant chief constable, Terry Sweeney, said no one had made any definitive admissions, there was no CCTV of patient treatment, and many staff had legitimate access to the rooms and materials involved.
On July 20, 2011, police arrested a 27-year-old nurse who worked on the same wards and is known by her initials, R.L. She was arrested at her home on suspicion of murder and two days later was charged with criminal damage with intent to endanger life, and alternative counts of reckless criminal damage, over the alleged tampering with saline. The evidence put forward against her at a bail hearing was a fingerprint on a damaged saline bag and a thumbprint on a bottle of antibiotic fluid that contained insulin. Her lawyer said she had been made a scapegoat. She was remanded to HMP Styal.
On September 2, 2011, the Crown Prosecution Service discontinued the case. Its chief prosecutor in the north-west, Nazir Afzal, said further inquiries had not provided a stronger case and that there was no case in law that could proceed on the evidence. She left prison after 45 days. "I have been living in hell," she said, "and was locked up in prison for something I had not done." She had always denied the allegations.
At Chua's trial the defense told the jury about her arrest. In his sentencing remarks the judge listed, as an aggravating factor, that Chua's crimes had brought suspicion on other staff, one of whom had been arrested and charged. After the verdicts, Sir Peter Fahy apologized to her publicly.
Chua was not arrested in 2011. The prosecution later showed that he was the only member of staff on shift near three key events: the five poisonings on the night of July 10 to 11, the discovery of the contaminated ampoules the following night, and the tampering of January 2012.
On the night of January 2 to 3, 2012, Chua altered the prescription charts of patients on his ward. Earlier he had argued with A.D., the daughter of an 86-year-old patient, M.P., about a heart monitor. A.D. had told him that if something was not in the notes, it was not going to happen. That night entries appeared on her mother's chart raising doses of several heart and blood pressure drugs, with risks of heart failure, bleeding and dehydration, and adding a drug that had not been prescribed. A print from the side of Chua's left palm was found on the paper. The judge had no doubt that Chua did it to get back at A.D.. The charts of six other elderly patients were altered to increase their doses. One of them received extra doses of two heart drugs before the changes were found; she suffered only minor effects but, the judge said, was left to live in fear.
Staff noticed the overnight changes, and on January 5, 2012, police arrested Chua at his home in Stockport on suspicion of tampering with medical records and unlawfully administering a poison. He was questioned about the 2011 poisonings too, then released on police bail while inquiries continued. He was to spend two years on bail.
Searching his house, detectives found a handwritten document that Chua seemed to have written for others to read, and which the prosecution put before the jury. Its date was unclear: Chua told police in interview that parts of it had been written much later. It bore the words "The bitter nurse confession," and in it he wrote that he had a lot to tell but would take it to his grave. He wrote that he was a nice person "but there a devil in me," that he was "evil at the same time angel," and that people should work out "how an angel turn to an evil person." "I go straight to hell, no question," he wrote.
The document also referred to painkillers: at home, he wrote, he could stop himself taking them, but at the hospital, because of the staff, he could not help taking more than the limit, or else he would not cope with the job. He wrote that he told people he was fine "just to shut their mouth," and that he could still feel anger inside him that might explode at any time: he was still holding on and could control it, "but if pushed, they're going to be sorry."
The judge quoted parts of it and said it explained nothing. The prosecutor, Peter Wright QC, told the jury that Chua had acted out of personal frustrations, "for reasons truly known only to himself."
The investigation went on for more than two years after Chua's arrest, with many medical experts. In September 2012 police said they were investigating three deaths, the poisoning of 18 other patients and the tampering of medical records. On the first anniversary, in July 2012, Barraclough said detectives had set themselves the task of proving how each person was poisoned.
At the end of March 2014 Chua was re-arrested and charged. On March 29 he appeared at Manchester Magistrates' Court, aged 48, for a three-minute hearing, accused of murdering Tracey Arden, Arnold Lancaster and Derek Weaver, together with 31 other offenses: one of causing grievous bodily harm with intent, 22 of attempting to cause grievous bodily harm with intent, seven of attempting to administer poison and one of causing poison to be administered. He was remanded in custody. The NMC said it could now consider an interim order against his registration. The charges covered the period from June 1, 2011, to January 3, 2012.
The trial opened at Manchester Crown Court on January 20, 2015. By then Chua faced 36 counts relating to 21 patients, and he answered "not guilty" to each in a soft voice. The judge was Mr Justice Openshaw. Peter Wright QC prosecuted; Peter Griffiths QC led the defense, with Philip Parry of Exchange Chambers as junior counsel.
The prosecution relied on circumstantial evidence. The Crown used a "pulse chart" and a Venn diagram to compare Chua's shifts with the poisonings, and the judge later said the correlation between his working pattern and the attacks could not be explained by coincidence. There was the palm print on M.P.'s chart, the false entries in patients' records, and the letter.
The defense pointed out that none of Chua's fingerprints had been found on the contaminated ampoules or bags. Griffiths argued that Chua had been made a scapegoat after the first suspect was cleared, and that the pressure on police to bring someone to account had been huge.
The jury retired for about three weeks, which reports describe as 11 days of deliberation. On May 18, 2015, it found Chua guilty of murdering Tracey Arden and Derek Weaver. It found him guilty of causing grievous bodily harm with intent to Grant Misell, and of 22 counts of attempting to cause grievous bodily harm with intent, seven counts of attempting to administer poison and one count of administering poison.
It acquitted him of murdering Arnold Lancaster, and of the alternative charge of manslaughter, because it could not be sure that insulin had caused or contributed to his death. It convicted him instead of attempting to cause Mr Lancaster grievous bodily harm. It also acquitted him of one prescription count.
Barraclough said after the verdicts that the case had been a search for the truth and that the jury had reached the right decision. Greater Manchester Police called it the force's biggest case in a decade, and Ben Southam of the Crown Prosecution Service described an enormous task involving thousands of pages of evidence.
Mr Justice Openshaw passed sentence on May 19, 2015. He listed the aggravating features: a sustained and planned course of conduct; victims who were vulnerable, mostly elderly or terminally ill, many of whom were still suffering; the random selection of victims combined with direct poisoning, which he called unusually wicked; the suspicion cast on other staff; the January 2012 offenses; and the damage to the hospital's reputation and to public confidence. He called Chua a dangerous and devious man who had shown considerable cunning.
The only real mitigation was that the prosecution had not proved an intention to kill, and that alone, the judge said, saved Chua from a whole life order. His lack of previous convictions carried little or no weight, and his age was not a significant factor. The judge set a starting point of 30 years and raised it to 35. "He has committed a dreadful crime, he must now pay the price," he said.
Chua received life imprisonment for each murder with a minimum term of 35 years, less time already spent on remand. He also received life sentences, with shorter minimum terms running alongside, for the grievous bodily harm count and for each attempt to cause grievous bodily harm: 25 life sentences in all. The judge stressed that this was not a fixed term of 35 years. Chua would serve at least that long, would be released only if the Parole Board decided he no longer posed a risk to the public, and would remain on license for the rest of his life. Press reports at the time noted that he could not be considered for release until he was about 84.
Chua showed no emotion. Barraclough said he had been "hidden in plain sight," using unsuspecting colleagues to carry out his plan, showed "clear narcissistic and psychopathic tendencies" and a complete lack of remorse.
On May 20, 2015, Chua's solicitors, CM Solicitors of Manchester, released a statement from him. He said he denied being responsible for the insulin poisonings and the alterations to the prescription charts, that the evidence was entirely circumstantial, and that the verdicts were "not in accordance with the truth of the matter." "I am completely innocent of any wrong doing," he said, adding that he now faced a minimum of 35 years in custody "for crimes I did not commit." He asked anyone with information about the real culprit to contact his solicitor.
Philip Parry drafted grounds of appeal against conviction, which were lodged with the Criminal Appeal Office by July 2015. Chua also argued that his 35-year minimum term was manifestly excessive. In July 2016 the Court of Appeal in London refused him permission to appeal against both his conviction and his sentence. The convictions are final.
The South Manchester coroner had been unable to hold inquests while the police inquiry and the trial were under way. On May 20, 2015, the day after sentencing, John Pollard said he would open inquests into 10 more deaths of patients at Stepping Hill during the period when Chua worked there, and would consider resuming the inquests into the deaths of Tracey Arden, Derek Weaver and Arnold Lancaster. He said there was no immediate evidence that the 10 further deaths were caused by insulin poisoning, though in most of them there was reason to think the patients had had low blood sugar in hospital. What those inquests concluded has not been reported.
Police also investigated the death of an 82-year-old man on New Year's Eve 2011, whose medicines appeared to have been tampered with, as a possible fourth death in the inquiry. Chua was never charged in connection with it.
Chua is serving his life sentence in prison. The latest court decision found is the Court of Appeal's refusal in July 2016. No report of a further appeal, of a referral to the Criminal Cases Review Commission, of a transfer, or of his death was found in searches made in October 2026. His minimum term, counted from his remand in custody in March 2014, runs into 2049; only then can the Parole Board consider whether he may be released.
The case changed practice at Stepping Hill, where insulin was locked away and stock controls were introduced, and it fed into changes at the NMC, which said that overseas nurses now had to present original documents, attend an interview in person and pass competence tests.
It also became a reference point in later cases. At the Thirlwall Inquiry into the crimes of Lucy Letby at the Countess of Chester Hospital, lawyers for the families of babies said in opening statements in September 2024 that Chua had been sentenced only weeks before Letby began offending, at a hospital 43 miles away. Mr Skelton, a lawyer for one group of families, argued that the Stepping Hill case, in which insulin was the weapon, should at least have warned managers to consider that the deaths in Chester might be crimes, and Mr Baker, for another group, placed Chua on a list with Harold Shipman, Colin Norris and Ben Geen.
Proven by jury verdicts, and final: the murders of Tracey Arden and Derek Weaver; grievous bodily harm with intent to Grant Misell; the attempts to cause grievous bodily harm to the other named patients, including Arnold Lancaster, and through contaminated products; the poisoning and attempted poisoning offenses of January 2012.
Not proven: that Chua caused Arnold Lancaster's death. The jury acquitted him of his murder and manslaughter.
Never charged: the deaths of other patients examined by the police or the coroner, including those of patients who were poisoned and died months later of other causes, the 82-year-old who died on New Year's Eve 2011, and the 10 deaths the coroner reopened in 2015. No court has found that Chua caused any of them.
Disputed by Chua: everything. He maintains that he is innocent and that the case against him was circumstantial.
Unresolved: his motive. The judge found nothing in the evidence to explain it. The letter speaks of anger, frustration with staff and painkillers, but Chua said in interview that parts of it were written later.
Not proven in court: that his nursing qualifications were forged. Police said they had no confidence in them; the NMC said it had not been shown evidence of fraud. He was never charged with any offense over his qualifications.
Details that vary between sources: the spelling of Tracey Arden's first name ("Tracey" in police statements and most reports, "Tracy" in some press reports and in one heading of the sentencing remarks); Arnold Lancaster's age (71 in the sentencing remarks and contemporary reports, 81 in some 2015 reports); the number of contaminated ampoules first found (a batch of 36 in July 2011 reports; 45 pierced and 19 contaminated in the sentencing remarks); the length of the trial (three months or four); and the number of patients the inquiry counted as harmed, which changed as it went on.
1965 or early 1966: Victorino Chua is born in the Philippines.
1989: claims to have graduated as a nurse in Manila; works as a nurse there through the 1990s.
2002: moves to England on a work permit; joins the NMC register; works in care homes in Warrington and Stockport, then at Stepping Hill Hospital.
2005: his second daughter is born in Stockport.
June 27 to 28, 2011: earliest poisonings in the indictment, on wards A1 and A3.
July 6, 2011: Tracey Arden, 44, is admitted; she dies on July 7.
July 10 to 11, 2011: five patients are poisoned in one night, including Derek Weaver and Grant Misell; Arnold Lancaster dies on July 11.
July 11 to 12, 2011: a nurse notices a foamy ampoule; the alarm is raised; contaminated stock is found.
July 13, 2011: Z.A., 24, is poisoned by a contaminated saline bag.
July 15, 2011: end of the contamination period.
July 19, 2011: inquests opened and adjourned; murder inquiry under way.
July 20, 2011: a nurse, R.L., is arrested; she is charged two days later.
July 21, 2011: Derek Weaver dies.
September 2, 2011: the case against R.L. is discontinued; she is freed after 45 days in custody.
December 2011: police say 19 people were unlawfully given insulin.
January 2 to 3, 2012: Chua alters patients' prescription charts.
January 5, 2012: Chua is arrested at his home in Stockport; released on bail.
March 29, 2014: charged with three murders and 31 other offenses; remanded in custody.
January 20, 2015: trial opens at Manchester Crown Court.
May 18, 2015: convicted of two murders and the poisoning offenses; acquitted of murdering Arnold Lancaster.
May 19, 2015: life imprisonment, minimum term 35 years.
May 20, 2015: Chua issues a statement denying guilt; the coroner announces inquests into 10 more deaths.
July 2015: grounds of appeal lodged.
July 2016: Court of Appeal refuses permission to appeal against conviction and sentence.
September 12, 2024: the Stepping Hill case is cited at the Thirlwall Inquiry.
2049: earliest date on which the Parole Board can consider his release.