AMHERST, Mass. (AP) — The University of Massachusetts-Amherst is reviewing a program that allows campus police to use students as drug informants following the heroin overdose death of one such informant.

The unnamed student was told he could become an informant and in exchange the university would not tell his parents, pursue criminal charges, or discipline him. He was caught selling LSD, but denied having a drug problem and refused treatment even thought it was offered.

The 20-year-old junior was found dead in his off-campus apartment last October.

A school spokesman said in a statement Monday that UMass Police and Student Affairs, with input from students, will investigate whether changes should be made to the program in preparation for a scheduled police accreditation review.

No active student is currently enrolled as a confidential informant.