Ricardo “Richard” Leyva Muñoz Ramirez (February 29, 1960 – June 7, 2013), dubbed the Night Stalker, the Walk-In Killer and the Valley Intruder, was an American serial killer and sex offender whose crime spree took place in California from June 1984 until his capture in August 1985. He was convicted and sentenced to death in 1989, and died while awaiting execution in 2013.