Careless driving, caused an accident and didn't inform it, ran away from the accident scene, hiding from the police.
Hopper caused a small traffic accident in Taos, New Mexico in 1975; Dennis ran from the scene and didn't inform the police about the accident. Taos police picked him up later at his home and took him to prison at 1:45. He was bailed out 20 minutes later. In court he was sentenced to pay 250 dollars in fine.
Well, what did you expect from an Easy Rider?
If you have more details about these incidents let me know.