I walked away from an accident I witnessed...

[DoomSlice]

I was walking to an appointment at 8oclock and I was running a little late. I was about to cross the road when I saw that some young girl was about to turn left into where I would be walking, so I stopped. When she turned, another car came baralling forward and T-Boned the girl's car and sent it sliding across the concrete. I looked in the window to see if anyone was hurt, then I left in a hurry so that I could make my appointment.

Should I have stopped to be completely sure that no one was hurt and to give the police a statement?

Edit: I didn't have my phone on me!!!