Update: Wendy J. Muchman's name was misspelled in the original publication of this story. A correction has been made.James J. Grogan and Wendy J. Muchman served 70 years, collectively, at the Illinois Attorney Registration & Disciplinary Commission.This summer, the two longtime ARDC attorneys left the agency. Grogan worked his last day on Wednesday and Muchman left on July 15.Grogan, 63, retired after 40 years at the agency. Muchman, 62, has taken a full-time faculty position at Northwestern Pritzker School of …