I was arrested last weekend. Send a letter to the City Attorney's office, at PO Box 1997, requesting the police reports. Include the date and charge that you were arrested for. They will be mailed to you as soon as possible. My 23 year old son was arrested.
All criminal information is confidential.
Because your son is over the age of 18, only he, his attorney, or the victim can receive information on the case. If your son were under age, then you could request the information for him.