My son has been charged with a Class A misdemeanor Assault with Bodily Injury that our attorney is now telling us may be upgraded to Aggravated Assault. He drove three kids to another kids house. The three kids got out of my sons car. The victim came out of the house with a baseball bat. The three kids took the bat away, threw it onto the ground, and assaulted the victim. By all accounts my son never left his car. After the kids finished with the assault they piled back into my sons car and he took them back to their cars at a local convenience store. A police officer talked to my son at the store. He told them where they could probably find the assailants. Our attorney says they are using the Law of Parties to charge my son. What's the penalty for a first time offender? Any other advice?