In Tulsa, a late night party turns into a blood bath, but a Facebook video may help Detective John Brown dispute a suspect's claims that he wasn't there. In New Orleans, when a man is robbed and shot multiple times on his payday, Detective Rob Barrere has a hunch this isn't just a random robbery gone wrong. When surveillance footage shows a man carrying a box moments before he is shot, Detective Tracy Casey must determine if the box's contents holds the key to determining motive. A late-night shooting in North Minneapolis leaves one man dead and another alive to help detectives identify the killer.