Teenager kills masked intruder holding gun to mum's head only to find out it was his dad
Malachi Heisler shot his father John Heisler after he broke into the house to speak to his estranged wife.
"I had about five to six seconds to make a decision," said the 18-year-old.
"By the time I did recognise him, the decision was made."
Police said Heisler, 46, forced his way into the home, smashing windows as he went, while decked out in full black tactical gear, including a ski mask and thigh holsters.