Watch Serial Killer: Devil Unchained Season HD Full Free on solarmovie.do. Watch Serial Killer: Devil Unchained tv series online free. Investigative journalist Maria Awes gets a call from serial killer Todd Kohlhepp, who claims that he...Investigative journalist Maria Awes gets a call from serial killer Todd Kohlhepp, who claims that he has murdered more victims. She teams up with former FBI profiler John Douglas and Kohlhepp's biographer Gary Garrett, to unravel the truth.