Police at the University of Illinois have charged seven members of a fraternity with drug offenses after a yearlong investigation.

University police detective Sergeant Joe McCullough tells The Champaign News-Gazette that since April of last year the department had been using informants to buy marijuana and Ecstasy from members of the Lambda Chi Alpha fraternity.

Officers conducted a raid Thursday night on the fraternity’s house, turning up Ecstasy pills, suspected LSD, marijuana, magic mushrooms and empty nitrous oxide cartridges. Drug paraphernalia and cash were also seized.