2. Alexander Pichushkin
This dark-eyed seemingly meek and common-looking boy grew up to be none other than Alexander Pichushkin, more infamously known as The Chessboard Killer or The Bitsa Park Maniac. The Russian serial killer is believed to have killed between and 60 people. The victims’ bodies were found in Moscow’s Bitsa Park. The serial killer was finally apprehended in 2006 and was sentenced to life imprisonment for his heinous crimes. It is suspected that Pichushkin suffered damage to his frontal cortex when a swing struck him on the head, when he was a child. This injury is likely to have produced poor impulse regulation and a tendency towards daggression.