My roommates and I once solved my own hit and run. I borrowed my Bro's car, it was parked on the street. I was in bed sleeping and my roommate ran in and said someone just hit my Bro's car and took off. Called cops, while waiting, we found a piece of the taillight, which looked to me like from a Dodge pickup.
It dawns on me I regularly see a Dodge pickup parked across the street, but it not there now. So we took a ride around the back alley where the actual driveway is, sure enough parked there is the Dodge pickup w/the perfectly matching broken taillight (The person didn't live there but a friend of theirs did). So we took some pics, got the plate, etc., pretty much as soon as we left to go back and wait for the cops the person drove off in the pickup.
Cop gets to my place we explain all, give him the light & the pics, including ones of my bro's car. Cop looks up the owner of the truck from the plate & did go talk to the dude @ his house. Bagged him for the hit & run, and the guy's insurance paid to fix the car. My guess is, since it took 3 hours for the cops to arrive, it was probably enough for him to avoid a DWI too.
Moral of the story, if you do hit someone and run....park more than one or two blocks away.