The guy stole the gun.We now know through the testimony that this wasn't the heinous cold blooded murder that the Hannity/Trumps of the world sold you on (and you wholeheartedly swallowed). But this was more than just a felon in procession of a firearm. Whether he "found it" or not he was ultimately responsibly for the effects the firearm and it's discharging brought about. Someone died due to his actions. An "accident", is when someone walks out in front of a vehicle in traffic, NOT when someone has a gun in his hand. Our gun laws need to be changed, period.
Even if you believe he "found it", he's still a felon in possession of a gun, already illegal.
What "gun law" would have stopped this crime?
How many laws were broken in order to put this guy on a pier in San Francisco with a gun?