Was the guy stealing the cars or just acting as a unauthorized parking attendant?
It sounds like just an unauthorized parking attendant
The shooter parked his car, as did his date.
A guy, the scammer, came up and asked them for $20 each to park their cars there.
He paid and
They walked to the restaurant.
A valet told him, that the guy was a scammer.
That’s when, the shooter, decided to go show how macho he was....(first Match.com date) and went to confront the scammer.
Sounds like the shooter was carrying a concealed weapon, as he returned it to his car after the shooting.
He them went into the restaurant, I suppose for a drink, then the two, went elsewhere.
We don't use that word "unauthorized" any more. That stigmatizes the person. The preferred designation is "undocumented" parking attendant. /sarc
In any case, the point is moot. The parking attendant is now an unliving parking attendant.