Someone hit my STI and I got a plate number and everything to the cops right away...
I haven't gotten/heard shit and it's been atleast 4 months.
Take that for what it's worth.
*edit*
if you're insured tell him to take it to his insurance. If someone hit me, and I was super worried about getting it fixed, I would turn it into the insurance company. D00d is gonna pocket the money and go buy beer w/ it.
Only thing I would do, tell him to get an estimate, go to the body shop and watch him hand the keys over to them to get it fixed, pay the body shop the cash, not him.
You may get lucky and he could be uninsured, then YOU put a claim in and U win.