However, as the show went into pre-production, the cast began to change. On June 13, 2013, it was announced that Melissa Sagemiller would no longer be a part of the show and Jesse Lee Soffer officially joined the cast as a series regular. On August 23, 2013, Patrick Flueger and "One Tree Hill" star Sophia Bush joined the cast as Officer Adam Ruzek and Detective Erin Lindsay, respectively. Marina Squerciati joined the cast on August 28, 2013. On August 30, Elias Koteas became a regular. Archie Kao was announced as a regular on September 27, 2013. On October 21, 2013, Stella Maeve was cast in a recurring role as Nadia, a pretty 18-year-old escort who is addicted to heroin and goes through a very difficult withdrawal. Sydney Tamiia Poitier was announced as a guest star in December 2013. On December 20, 2013, it was announced that both Eastwood and Raymonde had departed the series over creative differences.