I'm willing to wait for more context, but this looks very bad for the police officer.
FROM THE CURRENT INFORMATION AVAILABLE, it looks like the police officer was panicky because the driver willingly told him he was carrying a firearm, which we've seen video of that happening previously.
(As a note, why do some police officers become hair-trigger at that? If he TELLS you he's got a firearm, your threat meter ought to decrease, not increase because if he wanted to shoot you, he wouldn't tell you.)