Stand your ground? How about - self defense?
Based on this account: Why are there charges here?
The only part of it that sounds like it might be a colorable charge is that you could see his gun. But that really seems weak, and it’s only a misdemeanor I think. Not only that, but since the other guy is dead and Dooley denies it, I wonder what their evidence is for that.
I'm not able to find a clear description of the events from other people who were there, but it is hinted that Dooley drew his gun and aimed it at two 16 year old skateboarders, and that James then engaged Dooley to protect the kids. Seeing that manslaughter charges were fired, as well as brandishing a firearm charges, that seems to be the basis the DA's operating on.
I wasn't there, can't say what happened. I know how arguments over trivial matters can grow heated instantly. But I find it hard to believe that an retired military man would jump a 61 year old and start choking him over an argument about kids skateboarding in a park. But I can easily see how the confrontation could turn physical if a firearm was drawn.