(CNN)Three teenagers dressed in black and wearing masks and gloves were killed by a resident when they broke into a home, Oklahoma authorities said Monday.
A fourth suspect, the alleged getaway driver, now faces first-degree murder counts in their deaths, authorities said.
The 23-year-old son of the homeowner fired the fatal shots from a rifle, officials said. One suspect had a knife, and another carried brass knuckles.
"Preliminary investigation looks like it's self-defense," said Wagoner County Sheriff's Deputy Nick Mahoney, cautioning the investigation was continuing into the midday home invasion.
The shooter voluntarily spoke with investigators. Neither he nor his father was hurt.
A 21-year-old woman, who Mahoney said may have been a getaway driver, turned herself into Broken Arrow police shortly after the shooting.
"Forgiveness is a strange thing. It can be sometimes easier to forgive our enemies than our friends. It can be hardest of all to forgive people we love." Fred Rogers
The kid did the right thing, but according to the story he kept asking if they would be alright, so he was definitely concerned. I don't think anything can prepare you at that age to kill 3 people even in self defense. I hope he gets past it. The 3 idiots got what they deserved but still damage done.