With graduation nearing at Northeastern University, students are alarmed at the discovery of a fellow student shot to death in her apartment; detectives face many challenges before realizing the answer is right in front of them.

A New Year chill is in the air when a woman and her daughter are savagely murdered in their Woburn, Mass., home; detectives take a shot in the dark while solving this mystery.

During a storm in Key Largo, Fla., an intruder slips silently into the home of newlyweds Michael and Missy MacIvor; as the day dawns, a nightmare is revealed that will haunt the entire community for years to come.

After young mother Danielle Jennings is found strangled to death in her apartment, detectives immediately believe she knew her attacker, then, a witness comes forward with a ringer of a clue that leads them to an unthinkable monster.

In Iowa, Shirley Wilson's son finds her stabbed to death in her home; with no evidence of forced entry, detectives believe this grandmother of 12 knew her assailant, leaving the family wondering who has betrayed them in cold blood.

After an up-and-coming actress is savagely murdered in her home, police believe an angry, revenge-hungry killer is responsible.