A wealthy Fall City household was the scene of a familicide on October 21, 2024. Sarah Marks Humiston, 42, a former nurse, was found dead in the family home on Lake Alice Road Southeast along with her husband Mark Humiston, 43, and three children: Benjamin, 13, Joshua, 9, and Katheryn, 7. The King County Medical Examiner’s Office confirmed all five died of gunshot wounds.

Multiple 911 calls came from the residence in the early morning hours. An 11-year-old daughter survived after escaping to a neighbor’s house; she was injured and later told investigators she had been shot at in her bunk by the family’s 15-year-old son, whom she identified as the shooter. That account contradicted a 911 call in which the 15-year-old claimed Benjamin, 13, was responsible before saying he had killed himself.

The 15-year-old was taken into custody and charged with five counts of aggravated first-degree murder and one count of attempted first-degree murder; a judge ordered no contact between him and his surviving sister. No clear motive has been identified. If anyone knew the Humistons or has information about that night, please share what can help the investigation.