

In New York City, after a 15-year-old boy's murder, surveillance cameras capture both the attack and the killers; when someone guns down Timothy Moriconi on a Baltimore street, police turn to a neighbor's surveillance system to crack the case.
A shooting in Mississippi leaves a man fighting for his life, and police must use gunshot detection technology to track the shooter before he strikes again; in South Carolina, RTCC cameras capture a deadly bar brawl.