The Supreme Court refused to review the convictions and death sentence Tuesday for serial killer Richard Ramirez, the so-called Night Stalker who killed 13 people in California in the 1980s.

The justices declined without comment to act on Ramirez’s appeal. His killing spree terrorized the Los Angeles area in 1984 and 1985. Satanic symbols were left at murder scenes and some victims were forced by the killer to “swear to Satan.”