Published: Dec 15, 2010 12:19 AM EST
Updated: Dec 14, 2010 9:07 PM EST

FORT MYERS, Fla.- Twenty seven year-old Chad Moreland could face the death penalty if he's convicted in the murder of convenience store clerk Jerry Rabon. The Eagle Scout and Sherriff's Explorer in Training was working at the Hess gas station on Alico Road in August 2007 when he was shot to death.

A surveillance camera captured video from the night of the crime. Deputies say Moreland and his sister Iris robbed the station, and Chad pulled the trigger. But still Moreland's mother Vivian has her doubts.

"I know for a fact, he's a good child. I never had no problem with him. Never," said Moreland.

She says she can't even identify her son in the surveillance video, and doesn't believe he meant to confess to deputies.

She says he told her he didn't do it.

His trial may not start for another year because his lawyers are trying to prove that he is mentally retarded.