The Keddie Murders was a 1981 American quadruple-murder that took place in Keddie, a resort town in Northern California. The victims were Glenna Sharp, known as Sue (age 36), her son John (age 15), and his male friend Dana Wingate (age 17). The final victim, Sue's daughter Tina Sharp (age 12), was missing when the murder was discovered; her remains were found in 1984 in Feather Falls, Butte County.. Sue's two youngest sons and their friend were uninjured. A second daughter, Sheila, had stayed the night with neighbors.
No arrests have been made in connection with the murders. The cabin in which the murders took place was demolished in 2006.
There was speculation that the crime may have been an inspiration for the 2008 horror film The Strangers.
Glenna Sharp, 36, had been staying at the cabin for several months, along with her four children. On the night of April 11, 1981, Glenna was staying in the cabin with her daughter, Tina Sharp, 12, and three younger children (two of whom belonged to Glenna). They were later to be accompanied by her son, 15-year-old John Sharp and his buddy, 17-year-old Dana Wingate, who were seen that night hitchhiking from nearby Quincy.  Sometime after John and Dana arrived at the cabin after being dropped off, by who is still yet unknown (On the timeline at www.cabin28.com, it gives accounts of three other people who claim to have dropped the boys off that night but Craig Walters did not tell his story until some 20 years later so it is doubtful this story is accurate).
The following morning, Glenna's 14-year-old daughter, Sheila, who had spent the night with a friend at a neighboring cabin, found the dead bodies of her mother, brother, and brother's friend lying in the front living room; all had been bound with electrical wire and duct tape , and were beaten and stabbed beyond recognition. Tina Sharp was nowhere to be seen.
The savage nature of the crime was undeniable; the walls were covered with knife cuts, and the furniture had been destroyed. A sheriff patrol commander, Rod DeCrona, who arrived to the scene remarked that "There was blood sprayed absolutely everywhere". Upon examination of the bodies, it was clear that each of the victims had been bludgeoned with a claw hammer and stabbed repeatedly with steak knives. DeCrona also said that one of the knives discovered at the scene had been used so forcefully that the blade had bent entirely in half .
The case soon grew cold, and Tina Sharp's bizarre disappearance went unsolved as did the murders. The town of Keddie began to lose its visitors, and the resort turned into a ghost town. Three years after the crime, in 1984, the dismembered head of Tina Sharp was discovered near Feather Falls, roughly fifty miles downhill from the cabin resort. After this discovery no new information regarding the crime ever surfaced. No arrests have ever been made in regard to the crimes, nor have there been any solid leads as to the motivation of the killer(s). The murders remain unsolved to this day.