The Mayor’s staff is holding a briefing for aldermen this afternoon to discuss the next steps on a comprehensive police reform ordinance to replace the Independent Police Review Authority (IPRA) and to establish a Public Safety Auditor, City Hall sources say. The heads of the City Council’s Black and Progressive Caucuses, Ald. Roderick Sawyer (6), and Ald. Scott Waguespack (32) will both attend, as will Police Accountability Subcommittee Chairs Ald. Rick Munoz (22), Ald. John Arena (45), Ald. Joe Moore (49), and Public Safety Chair Ald. Ariel Reboyras (30). Yesterday, Emanuel spokesperson Shannon Breymaier reaffirmed the Mayor’s intention to pass a comprehensive ordinance reforming police oversight bodies in September, but wouldn’t elaborate on the contents of the ordinance.