Chicago PD fans are curious to know why Sophia Bush, who portrayed Erin Lindsay in the show, left after the Season 4 finale. Introduced in 2015, she is a detective who played a prominent role in the Chicago Police Department’s Intelligence Unit. However, her questionable actions in Season 4 put her beloved job at risk, leading to her departure.

Here’s the reason behind Bush’s Erin Lindsay exit from Chicago PD.

There are several factors involved in Bush’s departure from Chicago PD including abusive behavior on set, weather conditions, and toxic culture taking a toll on mental and physical well-being.

Previously, Bush appeared on Armchair Expert, detailing her reasons for calling it quits from Chicago PD. She said she worried that her exit might lead to others being unemployed. However, she eventually decided to quit.

“It has to stop, everything stops. I quit because, what I’ve learned is I’ve been so programmed to be a good girl and to be a workhorse and to be a tugboat that I have always prioritized tugging the ship for the crew, for the show, for the group, ahead of my own health,” the actor shared.

She also opened up about her struggles of working outside in Chicago, sharing her concerns about the freezing temperature, which was “literally 30 degrees below zero.” She reportedly claimed that her bosses asked her to remain tight-lipped otherwise it would cost everyone’s job.