Terrance O'Brien, 47, of 1417 E. Joyce Ave. in Palatine, is one of three former Schaumburg officers charged in the case.
He appeared in court Friday morning where he entered guilty pleas to unlawful possession of a controlled substance, official misconduct, burglary and armed violence.
He must serve 50 percent of his sentence before he is eligible for parole.
The cases against the other two officers, Matthew Hudak, 30, of 1870 Broadsmore Drirve in Algonquin, and John Cichy, 31, of 1202 Tuscany Drive in Streamwood, are currently pending. Both men are due back in court on April 29.
Authorities said on numerous occasions — and through the course of their work as narcotics investigators — O’Brien, Hudak and Cichy routinely confiscated drugs from drug dealers.
The are accused of keeping some of the drugs for themselves instead of placing the drugs into evidence at the Schaumburg Police Department and then selling the drugs on the streets and through other sources. They then divided the profits between them, according to the news release.
Police said the trio also stole $20,000 from a storage facility believing the money belonged to a drug dealer.
An acquaintance of O’Brien’s, Nicole Brehm, 45, of 1485 Cornell Court in Hoffman Estates, is also charged in the case. She is accused of allowing the men to use her residence as a "stash house" for the drugs.
She entered a plea of guilty to possession of a controlled substance, a class one felony, on March 6 and was sentenced to 46 days in the DuPage County Jail and 24 months of probation.
The DEA, DuPage County State’s Attorney’s Office, DuPage Metropolitan Enforcement Group and the Carol Stream Police Department investigated the case.