Judge and jury
It is presumptive, to say the least, that you have the right and implied responsiblity to shoot an alleged criminal on the way to who knows where. This is similar to the thinking of Zimmerman that shot Martin in Florida. Zimmerman assumed that Martin had to be a criminal, and in the end, an innocent kid was capped. Guns don't endow any of us with some superior god like power to make those judgements.
Misuse of firearms will always feed the anitgun crowd. Even percieved misuse will be twisted and used to the disadvantage of gun owners.