On October 21, 2024, Mark Michael Humiston II, 43, was one of five members of a Fall City, Washington family killed by gunshot inside their Lake Alice Road Southeast home. Mark was a White/Caucasian electrical engineer at Hargis Engineers, husband to Sarah and father to several children. Three children named in the report — Benjamin, 13; Joshua, 9; and Katheryn, 7 — were found dead alongside their parents. All five deceased suffered fatal gunshot wounds.

A 15-year-old son initially called 911 and claimed his 13-year-old brother was responsible, but investigators say forensic evidence and the account of an 11-year-old daughter — who survived by pretending to be dead and later escaped through a window to a neighbor’s house — contradicted that statement. The 15-year-old was taken into custody and has been charged with five counts of first-degree aggravated murder and one count of first-degree attempted murder. The matter is being handled in juvenile court, with discussion reported about possibly transferring the case to adult court.

If anyone knew the Humiston family or has information relevant to the investigation, please share what you know.