Legally you have to go to small claims court with something like this. You can always make someone pay........ Or pay back can be a *****!!!!
I just have a lot of information to find out who this was, and I'm sure he lives around Mustang somewhere. So ill run into him given enough time.
You're pissin' in the wind. There is nothing you will be able to do about it. Your insurance company won't do anything about something this small, either. Your biggest hurdle would be proving the truck did it. There could have been multiple people that parked next to your wife's car before she returned. My guess would be someone who slammed the door hard enough to leave that dent, would move their car before she came back. The truck could be an innocent person who parked there afterwards. The dent aligning up means nothing to prove quilt.
A qualified dent specialist would be able to pop that dent and buff the scuff to where it's not noticeable. And the fact you are publicly announcing you intend to damage another persons property based solely on the fact they where parked next to your car, is ignorant at best.