A hearing asking for the Chicago Police Department to mail notices to neighbors if gun or sex offenders are living within a block of them turned into an hour-long airing of grievances over the police department’s tracking of offenders, coordination with other city departments, the ease of using the registry website, and whether the 2,000 convicted and released gun offenders and 2,250 sex offenders living in the city is a vast underestimation. Three hours later, a virtually empty Council chamber heard testimony from the Department of Family and Support Services and the Chicago Police Department on improving community-police relations.