In Harris County, Texas, a man is stabbed at a strip mall in the middle of the night. Sgt. Craig Clopton finds surveillance video of the murder, but it leaves him with more questions than answers. Then in Dallas, a young man is shot dead in his living room. It appears to be a burglary, until Det. Brian Tabor uncovers a more treacherous motive.
In Harris County, Dep. Abraham Alanis and his team investigate the murder of a man, married with four young children, who was found robbed and shot to death outside an abandoned house. With no other leads to go on, investigators discover that their victim held a secret that could lead to his killer.
In Birmingham, Detectives Eric Torrence and Henry Lucas investigate the murder of a 31-year-old male found dead in a field. But with a tight-lipped community where street law is paramount, finding someone to talk is the team's biggest challenge. As the clock winds down, will the community pull through and bring the killer to justice? Then, in Charlotte a man is chased down and killed in front of his nine-year-old son. Detective Blair Fitch is shocked to discover the killer was getting even with someone else. The case takes a surprising turn and leads detectives to New York where the suspect turns up in relation to another murder.
Armed and ruthless, spree killers become infamous for turning a flash of anger and resentment into a deadly rampage. Columbine killer Dylan Klebold introduced America to the horrors of school shootings when he killed 13 students and teachers in 1999, and in 2007 Seung-Hui Cho made us relive the nightmare when he murdered 32 people at Virginia Tech. In the end killers like these often become their own victims, when they turn their weapons on themselves.