In Cleveland, Ohio, an aspiring police officer is gunned down during a vicious nightclub brawl, and it's all caught on tape. Investigators pore over more than 80 hours of surveillance footage, hoping to identify the triggerman, but the video doesn't show who fired the fatal shot. With so few witnesses willing to talk, the state needs to use the video to convince the jury of the events that led to this cold-blooded killing.

In Harris county Texas, a 41-year-old woman is killed in her home by four masked men. Investigators have an idea of who did, but can they get enough evidence to prove it? Then, when one of the defendants faces a jury, the defense turns the table and puts the Harris County Sheriffs' department on trial.