WAUKEGAN, Ill. (CBS) — A 30-year old former Lake County prosecutor’s law license is in jeopardy, as he has admitted to having a drug dealer as a roommate while he was sometimes handling drug cases.

As WBBM Newsradio’s Bernie Tafoya reports, Aaron Isaacson quit his job with the Lake County State’s Attorney’s office in 2009. The Chicago Tribune reports he had been a prosecutor in traffic curt, and sometimes handled misdemeanor drug cases.

LISTEN: WBBM Newsradio’s Bernie Tafoya reports

Isaacson testified at a hearing before the Attorney Registration and Disciplinary panel Wednesday that his roommate was a drug dealer, The Tribune reported. He said he had witnessed his roommate handle dozens of deals and even helped the roommate count and organize drug proceeds, the Tribune reported.

Isaacson also smoked marijuana and used cocaine while working as a prosecutor, the newspaper reported.

Isaacson admitted that he paid just $800 of the $2,800 monthly rent on the space, even though he knew Yoselowitz’s only source of income was drug dealing, the Tribune reported.

Isaacson was forced to resign from his post at the State’s Attorney’s office after Yoselowitz was arrested in downstate McLean County with 23-pounds of top-grade marijuana, the Tribune reported. Yoselowitz is serving a 12-year prison sentence after pleading guilty.

Isaacson was never charged with a crime, and he testified against Yoselowitz, the Tribune reported.

Isaacson’s attorney asked the disciplinary board to suspend his client’s law license “severely,” but not to take it away for good, the newspaper reported.