Rule 1, If you kill some one your going to jail.
Rule 2, if no one else is around to guard your place, it will be looted and burned. The mob will make up all kinds of stories after the shooting, ranging from the store was owned by a Klansman to cannibalism. If they can make Trayvon a 12 year old boy and George Zimmerman a white Hispanic racist they can definitely make a pawn shop owner an alt right neo nazi.
Other than family members no one is going to guard your property after a shooting. Its good to have family and close friends as America begins its slide.
If possible the police will disarm you and let your property be burned. Easier for them, better for the politicians they serve. Cameras will help deter criminal police action, but the politicians they serve will always confiscate the guns first and figure out the laws later. Have extra weapons, have guns you can get to when they steal your gun safe.
The cops are not your friends those days are long gone. Say nothing, to the police, while they wear body cams they have a lot of practice at entrapping people into making statements. This may not help with a real criminal, but it works great on normal citizens caught up in the system. If even marginally injured demand to be taken to a hospital, it usually allows you to make a second phone call, delays the shock of capture, gives you time to think and documents any head injuries or other trauma incurred in the fight. Have a lawyer, not after a riot or self defense shooting, go get one now or as soon as possible. Move out of democrat run cities. You are not wanted there, you are a source of tax revenue and nothing more. You cant red pill or vote your way out of a demographic pit that is the democrat cities.
The pawn shop owner in question will be used as a public example and prosecuted to the fullest extent of the law by a government that has nearly unlimited resources.