typical traffic accident

a colleague of mine went into a ditch a few days ago because he wanted to overtake and suddenly came to traffic from the curve and someone stopped and photographed him like his car was in the ditch and the guy also reported it to the police…. and now he has no more plan what he should do now, should he go to the police and turn himself in? from the police no letter has yet come or so and in the accident he also did not get any harm except his w Agen…. can anything great happen from the police?