andrea mccarron, 9news now. >>> now to breaking news. d.c. police say the story we were told about war veteran pat casey is not the full one. >> he did die after a fight at the d.c. mcdon't but we have the breaking news. >> police just told us the story that is completely different from what the victim's parents told us. they said their son was stepping in to intervene with a group of men were harassing customers. police say it turns out they believe it was patrick casey that began the fight that ended up costing him his life. it began here at 2:00 in the morning just one week ago. casey was here with two buddies. investigators say he was the one harassing other patrons. >> no one has characterized it as looking to pick a fight. he was being irritating. >> reporter: the captain says when casey blocked the door, a verbal altercation started with another group and they took it outside. >> the initial push came from either -- we believe mr. casey. it may have been someone that was with him. >> reporter: he said then a man from the other group fo

live from falls church, andrea mccarron, 9news now. >> not everybody agrees with the approach. >>> we believe the wear vet killed out of a mcdonald's on m street may have started the fight that ended his life. police say patrick casey may have been drinking. they say he was irritating customers and blocked them from leaving. he got in a verbal fight and may have pushed one of them and then they pushed back. >> the altercation escalated a little more. sort of the chest to chest type stuff. that's when there was either a punch or a push resulting in mr. casey falling and striking his head. >> no one has been arrested and captain says at this time the charge that anyone could face is a misdemeanor simple assault. >>> the university of maryland is reexamining chemistry labs after an explosion. a student performed an experiment. two students were treated for first and second degree burns. investigators don't know what caused the explosion. the experiment shouldn't have triggered something like that but residue in a nearby waste container may have played a role. >>> 1500 bucks for a late mo