dude went to "pick it up"
"the gun went off and shoot by itself"
i don't see him squeezing the trigger
he's an FBI, so he's train
i don't think this dude would squeeze the trigger
thus the only explantation is
"the gun shot itself"
"a discharge"
funny how you say it didn't shoot
when this dude is clearly shot and bleeding in the leg
hope he can still walk