I'm sure your attorney told you you screwed the pooch -- you don't have an attorney??? YGBSM!!! Leaving the scene is a serious charge, (stooopid too), no matter how it looks from the comfort of the drivers seat looking backwards thru your mirror at the pedestrian you just hit. (The fat kid's attorney is gonna eat that up!) Dude, if I check my watch it's 2005, everybody is looking for an easy buck and the fat kid's dad is looking at several thousand of your bux, all he's gotta do is pick it up.
THESE DAYS, SOME PEOPLE CARRY A DISPOSABLE CAMERA IN THEIR CAR TO KEEP THE OTHER MF FROM LYING. Doesn't really matter if the thing doesn't work, like Christmas, it's the thought that counts. And maybe it will work and save your butt, or you can use it at someone else's scene and sell them the pix.