Correction: A previous version of this story misstated Lanetta Haynes Turner's salary as interim chief of staff as $186,000 annually. It is $154,000.

Cook County Board President Toni Preckwinkle announced late Wednesday that she’d “demanded and received” resignation from her Chief of Staff, John Keller, after she learned of a corroborated allegation that Keller “had engaged in inappropriate behavior on his personal time.”