A Martinez Junior High School student was arrested last week after he was allegedly found to be in possession of stolen prescription pills for sale, Martinez police Cmdr. Gary Peterson said today.School officials learned that the boy was allegedly selling prescription drugs after another student who had bought and ingested the medication came into the office Friday feeling ill, Peterson said.The school called police to investigate the incident.During the investigation,officers recovered more than 30 pills from the boy, police said. Peterson declined to elaborate on what types of pills they were, saying investigators are still waiting for results of toxicology tests.The suspect, whose name and age have been withheld because he is a juvenile, had allegedly taken the medication from a family member without that person’s knowledge, Peterson said.He was arrested on suspicion of possession of a controlled substance for sale. During the investigation, police identified 11 other students who are believed to have been involved in purchasing or distributing the prescription medication. None of those children have been arrested, but the investigation is ongoing, Peterson said.School officials have notified the parents of all the students suspected of being involved.