Accident -> log book problem. Please, need help!

Hi, my boyfriend called me this morning. He was making a U-turn and hit the car. It was a white car, sitting in a white snow. He just didn't see it.
Nobody was hurt and the damage to the car is minor. BUT...
He messed up with his log book about 11 days ago. He had driven more than 14 hours, because it was the only way to be in time.

So... I'm so scared now. Is it really possible for him to go to jail for that??
He said, police would check his log book for 8 days. That's what they told him. What if they check it for a few more days, is it possible?
It's his first year in truck driving.

What can be done? Is there any way I can help him?

Thank you!

 

It was in the huge parking lot, from what I could undertsand, not on the road.
If he give them records for 8 days, can they check it somewhere else? Like those scales on the truck stops.

 

Thanks for answering!
I'm not sure I could explain the situation good enough. I wasn't there with him.
I've just send him a link to this thread, so he could come here himself and explain it better.