Murayenko was born in 1971 and the killings were placed in Petropavlovsk, in northern Kazakhstan, in 2000 and 2001. Six women were killed, and a man described as an inmate, which would mean a killing in custody after his arrest.
A court sentenced him to death, and a BBC report of June 26, 2001 recorded the sentence. That report is the whole of the accessible record.
He was sentenced to death in June 2001, and what became of that sentence is not recorded in any source available here. Kazakhstan carried out its last execution in 2003 and declared a moratorium in December 2003, which was still in force when the country abolished the death penalty for ordinary crimes in 2021. Whether Murayenko was executed in the interval, or had his sentence commuted under the moratorium, is not recorded in anything accessible here.
No judgment is published, the victims are unnamed, no method is recorded, and the count of seven is the number the court accepted.