On March 8, 2001, Jane Larson, 63, was found murdered in her Des Moines, King County, Washington home. Her husband, Richard Larson, 64, and two 17-year-olds, their grandson Taelor Marks and his girlfriend Josie Peterson, were also killed in the same incident. The two adults had been shot; the teenagers were beaten to death.

Investigators identified 23-year-old Leemah Carneh as a suspect. Prosecutors charged Carneh with four counts of aggravated first-degree murder and said jealousy and an obsession with Taelor and Josie motivated the killings. Multiple mental health evaluations followed; Carneh was diagnosed with paranoid schizophrenia and competency to stand trial became the central legal issue. In October 2005 a King County Superior Court judge dismissed the murder charges after finding Carneh not competent to assist in his defense, and he was to be civilly committed rather than tried.

Does anyone have information about the victims, the household, or the events leading up to March 8, 2001 that could add clarity for readers and investigators?