Serhiy Tkach is a former Ukrainian

Ukraine

Ukraine is a country in Eastern Europe. It has an area of 603,628 km², making it the second largest contiguous country on the European continent, after Russia...

 police criminal investigator, originally from Russia, and a convicted serial killer

Serial killer

A serial killer, as typically defined, is an individual who has murdered three or more people over a period of more than a month, with down time between the murders, and whose motivation for killing is usually based on psychological gratification...

 who claimed to have killed 100 people. He suffocated girls aged between eight and 18 and performed sexual acts on their bodies after they were dead. Although Tkach admitted his crimes and demanded the death penalty, after a one year trial, a tribunal in Dnipropetrovsk

Dnipropetrovsk

Dnipropetrovsk or Dnepropetrovsk formerly Yekaterinoslav is Ukraine's third largest city with one million inhabitants. It is located southeast of Ukraine's capital Kiev on the Dnieper River, in the south-central region of the country...

 sentenced him to life imprisonment

Life imprisonment

Life imprisonment is a sentence of imprisonment for a serious crime under which the convicted person is to remain in jail for the rest of his or her life...

 for the rape

Rape

Rape is a type of sexual assault usually involving sexual intercourse, which is initiated by one or more persons against another person without that person's consent. The act may be carried out by physical force, coercion, abuse of authority or with a person who is incapable of valid consent. The...

and murder of 36 women over more than two decades. Over the years, nine people had been wrongly jailed for some of the murders of which Tkach was found guilty. One of the men wrongly accused killed himself.