Just over a year after five Columbia students were busted for running a drug ring out of the school’s dorms and fraternities, the last of the five has pleaded guilty, the Associated Press reported Tuesday.

Starting in July 2010, an undercover police officer purchased over $11,000 in drugs from the students over a five-month period in a sting operation called “Operation Ivy League.” All five plead guilty and received sentences of varying severity. One, convicted of dealing cocaine, spent six months in jail; another, accused of selling Adderall, will be allowed to plea to a drug misdemeanor in a year if he completes 300 hours of community service.

Adam Klein, the last of the students to plead guilty, is expected to receive five years of probation at sentencing on Feb. 28.

[via HuffPo.]