A German serial killer accidentally killed himself while he was masturbating in his jail cell over the weekend.
The guards at the prison opened his room up and found him still tied up on Monday morning.
Prison spokeswoman Candida Tunkel said: “He removed a cable from his bedside table lamp. Then he wound it around his nipples and his penis and stuck the end in a power socket.”
His autopsy revealed that the 62-year-old had died of heart failure brought about by an electric current flowing through is chest.
Further investigation confirmed that there was no foul play that resulted in his death. His lawyer also said that Schiffer was not suicidal.
Schiffer was serving time for killing five female hitchhikers from 1983 to 1990.
He was convicted 18 years after his final murder and was sentenced to life in prison in 2008.
His victims were all women trying to hitch rides home from nightclubs. One of the women was as young as 15. Schiffer raped three of the women before burying their bodies in the woods.