Oleg Petrosyan

Oleg Gennadyevich Petrosyan (; born 20 November 1977), also known as the Karate Maniac , is a Russian serial killer and sadist who committed assaults on pedestrians in Moscow between 2005 and 2008, which resulted in six deaths.

Early life Petrosyan was born in Tbilisi, in the Georgian SSR, on 20 November 1977.

On 13 October 2008, the body of a disfigured woman was found in a park near . She had been covered in more than two dozen hatchet wounds. Detectives determined that the perpetrator was of unsound mind and connected the attack to other recent murders in the area. Witnesses described the attacker's appearance and a composite sketch was created. Petrosyan, looking identical to the sketch, was eventually arrested after being recognized in public near the Izmailovskoye Highway, after which he openly confessed.