This appears to be another senseless killing motivated by fear and actuated by gun courageousness.

The Atlanta Journal-Constitution  01/29/2013

A Gwinnett County man is accused of shooting and killing a man who friends said pulled into the wrong driveway.
Phillip Walker Sailors, 69, of Lilburn, was booked into the Gwinnett County jail Sunday afternoon and charged with murder for the death of Rodrigo Abad Diaz, according to jail records and his arrest warrant.

Diaz, 22, was shot in the head Saturday night as he tried to drive away from Sailors' home on Hillcrest Road in Lilburn, the warrant states.
Friends of Diaz, of Duluth, told Channel 2 Action News that he and others were trying to find a friend's house, but their GPS instead led them to the home on Hillcrest Road, off Indian Trail Road.

After seeing the car in his driveway, Sailors came out of his home, went back inside, then came out again with a gun and shot in the air, Yeson Jimenez, 15, told Channel 2. Jimenez said he and his brother were in the car with Diaz, along with a female passenger.  Diaz tried to drive away, but Sailors shot again, striking Diaz in the head, according to police.  An attorney for Sailors told Channel 2 the man shot because he feared his life was in danger.
"He is very distraught over the loss of life from the defense of his home," attorney Michael Puglise said. "This incident happened late in the evening hours when he was home with his wife and he assumed it was a home invasion and he maintains his innocence."

Sailors remained late Monday in jail, where he was being held without bond. He has no known criminal history.  Lilburn police declined to release additional information about the shooting Monday night, citing the ongoing investigation.