Chicago PD 4×22 “Army of One” Season 4 Episode 22 Promo – A live video is streamed online showcasing a tortured man being beaten and burned alive. Upon further investigation, the victim’s identity is traced back to that of a man who had been previously locked up for statutory rape. When another attack of a similar nature occurs, Intelligence finds a connection between the crimes, suspected pedophiles, and group named the Perv Hunters. Meanwhile, Lindsay (Sophia Bush) runs into a few bumps in the road – both personally and professionally. Also starring Jason Beghe, Jesse Lee Soffer, Patrick John Flueger, Elias Koteas, Marina Squerciati, LaRoyce Hawkins and Amy Morton. Guest starring Markie Post, Esai Morales, Tracy Spiridakos and Nora Dunn.