Mary Louise Cannon, 75, was murdered in her Arcadia, California, home on July 2, 1985. She was attacked while asleep and was beaten and strangled to death. The house was ransacked during the attack, suggesting the assailant searched for valuables.

Her killing was linked to a series of violent home invasions that struck the Los Angeles area in the mid-1980s. The suspect named in connection with her murder is Richard Ramirez, known as the Night Stalker, who carried out a campaign of burglaries, sexual assaults and killings across California in 1984–1985.

If anyone knew Mary Louise Cannon, her routines, or observed suspicious activity near her home around July 2, 1985, please share information that could help clarify what happened.