The feud was nearly two decades old.
When Josephine Ruckinger was only 20, she and a boyfriend robbed and trashed her parent’s home.
From that point on John Frew and his wife Roberta had nothing to do with their daughter.
But a few days ago Josephine and her husband Jeffrey decided to violently put an end to the disagreement.
Cambria Pennsylvania District Attorney Kelly Callihan said the pair went to her parents trailer home and "parked at the bottom of a long driveway, and walked up, heavily armed."
Police say John and his wife Roberta, along with son John Jr., 47, were watching TV after coming home from dinner out.
There was a knock at the door and Roberta got up to answer it. The last thing John heard from his wife was “Oh my God, they have guns!"
Josephine then killed her mother by shooting her in the chest at point blank range.
Jeffrey Ruckinger then shot and killed John Jr. but John Sr. had already run to a bedroom and grabbed a .22 revolver.
Not knowing who had broken in, John burst out of the bedroom and fired one shot, hitting his daughter Josephine in the head, killing her.
John then turned his attention to Jeffrey and the two exchanged gunfire with Ruckinger being killed.
Left alone as the only person alive John called the cops to report what had happened.
After investigating police say the Frew’s were the target "of a pre-planned murder" plot, and ruled John Frew acted in self-defense.
Cops think the Ruckinger’s planned to burn the evidence, they found a gas can and lighter fluid in the Ruckingers' car.