Kunzewoer Friedhof
On June 22, 1989, Souther reportedly committed suicide in Moscow at the age of 32, only three years after his defection. Souther died from asphyxiation caused by carbon monoxide poisoning due to sealing himself inside his garage and started his car. Soviet newspapers suggested he had been depressed from severe homesickness. His death was announced by the "Red Star" newspaper, and he was eulogized by KGB chairman Vladimir Kryuchkov, who considered him to be very important agent. Souther was buried in Kuntsevo Cemetery in Moscow.