My 19-year-old son has been caught with about 8gms of cannabis and utensils. He has a notice to appear in 3 weeks. He was supposed to go to the police station that next day for an interview. It was very informal and the police stated that because he was so compliant and polite they decided not to do the interview but they still had to issue him with the notice. He suffers from autism and has been caught with utensils before and had to do a police order drug diversion. Will he go to jail? And what do I need to do to prevent this?