released police surveillance video of this august shooting death, you see mary knowlton, the 73-year-old former librarian step in front of the crowd. it s her turn to play the victim. playing the bad guy is punta gorda police officer lee coel, who at this moment, has no idea that the gun he s holding is loaded with real bullets. this is supposed to be make-believe, a police training exercise for gun owners. but right here, when coel starts firing, knowlton falls to the ground. suddenly there were three loud gunshots. i caught her eye as she then went down onto the ground. reporter: the crowd in the police station parking lot isn t sure what s happening. police then rush to her side. officer cole lost his job and is fighting to get it back. he s also fighting charges, pleading not guilty to felony manslaughter. lee coel was not responsible for ms. knowlton s death. reporter: coel s lawyer says that a number of other people were responsible for making sure the gun wasn t really l