From left: Ald. Chris Taliaferro (29), Ald. Harry Osterman (48) and Ald. Nicholas Sposato (38) during the June public safety committee hearing. 

Proponents of a grassroots-backed police oversight ordinance have been inching toward an agreement with Mayor Lori Lightfoot’s office over a long-delayed plan to establish an independent commission to oversee the Chicago Police Department, multiple aldermen told The Daily Line on Thursday.