The District - Season 3 Episode 18 Bloodlines

After a black prostitute is found murdered with the inscription "Respect the Order" attached to her body, Mannion and his team start a deep investigation that leads to a racial criminal who started serial killing African-Americans who were involved with white people. Meanwhile, Parras sees her father being arrested for requesting the services of a prostitute and has to face her own family problems. Temple helps a friend detox from heroine and Ella investigates a suspicious fire that could promote an officer, but ends up being the reason for his arrest.