That need for revenge will do more damage to your friend than good.
Just let the police do their job.
As far as JAIL time, for an accident like that? Good luck, even if it was hit and run.
I was hit by a guy that had a narcotics record and no insurance--if he ever faced any consequences at all, I'm not aware of it.
My oldest son was hit by a THIRD time DUI, with (obviously) no valid license and no insurance. He ended up with several thousand dollars in medical bills. After three years +, she DID finally get a jail sentence, but ONLY because she made the brilliant decision to show up in court that day stoned. LOL.
Our attorney was ready to let her plead to a lesser charge that would have involved time served (about a week), but said he'd only do it if she submitted to a drug test RIGHT then. HER attorney had to say, in court, "Your Honor, I don't believe my client would pass a drug test at the moment."
She was also ordered to pay all our expenses, but…yeah…no job, jail time, DUIs, no insurance…not like we'll ever see THAT money.
Just be glad nobody was too seriously injured (assuming that they weren't, that is. I assume you'd have mentioned it if they were), and don't hold on to the bitterness, that's my advice to your friend. It'll do them a LOT more good than trying to enhance a cr*ppy cell phone pic will.