shots, turned to face his wife, attempted to commit suicide with the third shot. >> the theory backed up by forensics. the shots were fired from close range, two or three feet. there was a heavy concentration of gunshot residue on only robert hall's hands and only one man's dna on the trigger guard. >> the dna matched that of mr. hall. >> i think that rob hall went to the walgreens in order to confront emmitt corrigan, that he took a loaded gun and rob decided that was his opportunity to get his candy back, by killing emmitt. >> why did he talk to emmitt for eight minutes before he fired? the store was closing, said the prosecutor. people were going home. >> i think he waited until there were no eyewitnesses, and he executed emmitt corrigan. >> a neat and tidy theory,