ron westbrook had alzheimer's, and was apparently disoriented.uthorities are deciding if charges should be filed against the shooter. joining us now is lance lorusso, a former attorney and law enforcement officer. thanks for joining us. explain georgia's stand your ground law. >> essentially it says when you are in a place where you have a lawful right to be and you are not committing an unlawful act, you have to obligation to retreat if faced with a threat. >> what has the shooter told investigators? >> i'm not sure. that's up to a lot of question. the sheriff's office is looking into the matter. he said that he heard noises in the house, someone trying to get in and went outside into the yard. he confronted the man who was, he thought, trying to get into the house. that's all we know >> does it matter if he's in the house or out in the yard? >> to a certain extent. the stand your ground law says you have no obligation to retreat. it's universally the same throughout the united states. it does not bring the legality of whether or not the use of