Shannon Michael House, 39, disappeared from a remote area near Kettenpom in Trinity County, California, between October 11 and 12, 2015. He was working with his brother at a marijuana grow site and was last seen sitting quietly in his pickup truck around 7:00 p.m. on October 11. When his brother woke at 4:00 a.m. the next morning, Shannon was gone. His truck, wallet, phone, and shoes were left behind.

Before he vanished, Shannon had abruptly stopped taking prescribed medication; his family said that may have caused paranoia, insomnia, and episodes of disorientation. There were also reports that he had tense relationships and had received threats, so his relatives consider both possible foul play and the possibility of suicide. Extensive searches using drones, trackers, and a helicopter found no trace. Distrust between growers and law enforcement delayed early search efforts and complicated the investigation.

Anyone who knew Shannon, worked near Kettenpom, or was in the area on October 11–12, 2015, is asked to come forward with information.