MIDDLETOWN, Conn. (AP) A Wesleyan University student suspected of selling the club drug Molly on campus has been arraigned on charges stemming from on-campus overdoses that sent a dozen people to the hospital.

Andrew Olson, of Atascadero, California, appeared in court Tuesday on charges including selling and possessing a hallucinogen.

Three other Wesleyan students already have been arraigned on charges related to the overdoses, which occurred the weekend of Feb. 22. All four have been suspended from the private university of nearly 3,000 students in Middletown, Connecticut.

Court documents indicate witnesses told police they bought Molly from Olson for $20 per dose.

Olson has denied selling Molly to students. Police say he told them people sometimes took Molly to his room so he could make sure it was safe to ingest.