https://youtu.be/kVyheV13o9A
Russian serial killer Alexander Pichushkin, nicknamed “The Chessboard Killer,” was caught in Moscow and convicted in 2007 of killing 48 people. Following his arrest the police discovered a chessboard with dates on all but two of the squares, apparently connected to the murders he committed. Due to the gruesomeness and number of murders, Russians considered reinstating the death penalty.