In a marathon closed door briefing for aldermen in a 5th floor City Hall conference room Thursday afternoon, mayoral staff provided a basic outline, but no ordinance language, for police reform, including a more powerful agency to investigate the police’s use of force that would replace the Independent Police Review Authority (IPRA) and an inspector general with the power to audit the police department and the IPRA-replacement agency. Not included in the briefing were plans for a civilian police oversight board, which mayoral staff said would be taken up later, after the annual budget process is completed in October.