Peter Hsuntse Pan, a 66-year-old accountant, was shot and killed in his Lake Merced home on August 18, 1985. Both he and his wife, Barbara Pan, were found in their bed with gunshot wounds to the head; Peter was pronounced dead at the scene and Barbara survived but was left an invalid.

Investigators reported the killer entered through an open window. The scene included an inverted pentagram and the words Jack the Knife scrawled on the wall in lipstick. Ballistics later linked a bullet removed from Peter to rounds recovered at other scenes attributed to the same perpetrator.

The Pan family’s case is one of several violent attacks in San Francisco and Los Angeles in 1985 that shared similar brutality and markings. Does anyone have memories, photos, or information from Lake Merced around August 1985 that could shed more light on what happened that night?