Lightfoot’s deal also gives sergeants and captains a 2% raise for the period between July 2016 and January 2017 that was already granted to lieutenants as a result of an arbitration decision following a grievance filed by those supervisors. All the police supervisors will receive a 1% raise for 2017 that was already given to firefighters and the Fraternal Order of Police, the largest union that represents about 10,000 lower-ranking Chicago cops.