Alexander Tchayka (born 23 July 1974 in Sumy, Ukraine) is a Ukrainian spree killer responsible for the murders of four women in Moscow between January 31, 1994 and February 16, 1994.In 1989, Tchayka was arrested and convicted for raping a young girl. He was released in 1991 for 'excellent behavior'.On January 30, 1994 18-year-old Tchayka committed his first murder when he stabbed a young woman 21 times. Only the victim's son could identify his mother. The second victim was on February 7, 1994.