Ricardo "Richard" Leyva Muñoz Ramirez (; February 29, 1960 – June 7, 2013), dubbed Night Stalker, Valley Intruder (as his attacks were first clustered in the San Gabriel Valley), and Walk-in Killer was an American serial killer whose crime spree took place in California between June 1984 and August 1985. He was convicted and sentenced to death in 1989. He died in 2013 while awaiting execution.
