Sergei, a necrophilic killer known as "The Hippopotamus" because of his size, is believed to have slain up to 19 people in the suburbs of Moscow. Six more survived his attacks. In July, 1995 he was sentenced to death for his crimes
"I will be back," Ryakhovsky said after being sentenced. Local television reported that the killer intended to file an appeal. Ryakhovsky, 32, thick-necked, heavy-handed and pasty-faced, earned his nickname because he is almost six feet six inches tall and weight of 280 pounds. When the trial started in April, the prosecution accused him of killing 19 men and women aged between 14 and 78 up to his arrest in April 1993. Allegedly Ryakhovsky carried out necrophilic acts on his victims and stole their belongings.
In true Eastern European serial killer fashion Sergei first confessed to most of the charges, but later admitted only three murder attempts on elderly women -- despite the fact that he had led investigators to the naked and headless body of a young boy he killed. One of the more bizarre cases outlined by the prosecution was in January 1993, when they say Ryakhovsky killed a 78-year-old man, cut off his head with his hunting knife and returned a day later to saw off his leg. In another act of lethal bizarreness, in March of that year he strangled a woman, committed necrophilia, and blew her up with a bomb he put inside her.