Suspected armed robber breaks into home, threatens teen. But Dad pulls out handgun and takes aim.

Authorities said Robert MacDonald's wild night started when the 26-year-old held a knife to an employee at a Dollar General store in Stockbridge, Georgia, just before 10 p.m. Tuesday, grabbed cash from the register, and then jumped into the bed of a pickup truck waiting outside, WXIA-TV reported.

Henry County police told the station responding officers saw the vehicle and pulled it over — but MacDonald had already jumped from the truck bed and fled into a wooded area, according to two men in the vehicle who told police they had no idea a store robbery had occurred.

A short time later, MacDonald arrived at a home.

Police said the homeowner heard his dogs bark, went outside to check but saw nothing suspicious, WXIA reported. But after entering his bedroom, the homeowner told police he heard glass break and someone entering his house.

The homeowner's teenage son told police he saw MacDonald in the hallway and that the suspect — who had cuts on his hands — approached the teen in a threatening manner and said he was on the run from cops.

The teen then grabbed a shotgun from behind a door, pointed it at MacDonald and yelled for his father's help, the station said.

Police told WXIA that MacDonald began threatening the teen — and that's when his dad emerged with a handgun and fired it, fatally striking MacDonald in the chest.

Neighbors told the station they understood that the homeowner did what he had to do.

"It's not the kind of place that you would expect someone to come and break into your house," resident Shane Crim told WXIA. But "everybody's gotta protect their own."

Police told the station that the two men riding with MacDonald won't face charges as they weren't aware of the robbery — and so far the homeowner who killed MacDonald hasn't been charged, either.