It is clear that you are very frustrated by how the police handled the entire situation with your son. Without more information regarding the entire situation, I cannot express an opinion as to whether or not the police violated your son's rights in this casse, however, I can provide you with some general information:
Juveniles have the same 4th Amendment rights as adults when they are not on school grounds. The police cannot conduct a search of a minor without consent unless (1) the police have probable cause to believe they will find evidence of a crime, (2) they are searching the minor incident to arrest, (3) they need to conduct a search due to extigent circumstances.
If an officer has a reasonable belief that a minor has violated the law, the officer can detain the minor to conduct an investigation. During an initial detention, police are not required to let a minor call his parents. Minor's have the right to call their parents if the minor is arrested and taken to the police station or juvenile hall. The minor also has the right to have their parents present during a custodial interrogation that implicates the minor's Miranda rights.
I higly recommend that all parents of teens read the "A to Z Guide For Parents of Teens" prepared by the California State Bar. This guide is FREE and explains the rights of both parents and their children in a variety of situations. The guide is available in Spanish and English. The guidebook can be downloaded from the California State Bar web site - http://www.calbar.ca.gov/calbar/pdfs/cbj/2007-Kids-Law-English.pdf
Good luck with your teens!
Amanda F. Benedict
Law Office of Amanda F. Benedict
Appeals & Bicycle Accident Litigation
162 S. Rancho Santa Fe Rd., Suite F-20
Encinitas, CA 92024
(760) 942-0054 - phone
(760) 942-0055 - fax
Web Site: www.amandabenedict.com