20 yr old son charged with aggravated assault waving a gun out the window of the car no contact or discharge of the weapon three witnesses no priors done in denton county tx what could be the punish?

First of all, get him a criminal attorney. Call the Bar Association in your state, get some names, see who can take the case "pro bono", which means without pay. Otherwise, the public defender may be okay, maybe not, I would meet with him/her see what I think. The sentence depends on whether or not he is convicted of said crime. He could plead "no contest", means, okay I did it, but promise not to do it again. Depends on the county and the prosecutor's office, whether or not they will be lenient or hard on him. You could also write a letter to the judge, asking for leniency. Possession of a handgun alone is something prosecutors and judges don't play around with, then again, since it's Texas and everybody has a gun, they may give him a break. Good luck. Hope it's not too late, but tell him don't answer questions without his lawyer present. That is the law in every state.