From left: Ald. Matt Martin (47), Ald. Chris Taliaferro (29) and Ald. Roderick Sawyer (6) speak during a committee meeting on Wednesday

Aldermen advanced a measure on Wednesday to make it easier for people to get their names taken off a police-held criminal registry — but not before agitating over being left in the dark on a long-awaited overhaul of the intelligence-gathering system.