Here's the lowdown on Smith:
First offense - the gun charge. Story goes that his roommate threw a HUGE party at their home, hundreds of people. A fight broke out, I think someone got stabbed(not by Smith) so he went to his gun collection, got one out, and fired it into the air outside to clear the scene and send everyone home. Problem is, not only is firing an assault rifle in town illegal, but the type of gun is illegal to own in California. It was legal to buy/own in whatever state he bought it in, but not legal to have in California. So now he's facing charges related to owning and firing an illegal gun(but he didn't injure anyone)
Second offense - DUI, pretty striaghforward. Story goes that the police found him passed out in his car, with his car crashed into a tree, and his foot still on the gas, spinning his tires out as his car was trying to accelarate into this tree while stationary. He wasn't hurt, and he didn't hit anyone else, but he was definitely drunk and passed out in a running car at like 7am on a Monday morning on his way to practice. He ended up missing some games because of this while he was in rehab for alcohol addiction.
Third offense - Got singled out by the TSA for one of those extra inspections/pat downs. Apparently didn't like it(and was possibly drunk) and said some really dumb stuff about a bomb. Whether in jest or not, he got arrested for it.