There's a deeper reason behind Hank Voight's (Jason Beghe) adamancy in trying to save Anna Avalos (Carmela Zumbado) in Chicago PD.
NBC's police procedural wrapped up its year with the culmination of Intelligence's work against Los Temidos.
Unfortunately for them, things didn't go to plan as Voight's civilian informant (CI), Anna, went rogue after getting paranoid
that Javier Escano (José Zúñiga) would kill her and her son in the Chicago PD season 9 finale titled "You and Me."
Throughout the back half of Chicago PD season 9, the hunt on Los Teminos became the show's overarching narrative.
Throughout the mission, the pair bonded and developed an almost father-daughter dynamic. All of this explains why Voight was determined to save her.
Tragically, despite his best effort, Anna was killed in the Chicago PD season 9 finale by no other than Hailey Upton (Tracy Spiridakos) herself.
Regardless, it's safe to say that Anna's sad fate in the show will haunt him for the rest of his life.