A 17-year-old Dallas boy recently made headlines after he allegedly told police that he killed his mom and sister. Would you know if you were raising a killer? In a very rare and emotional interview, hear from Jeff, whose son, Andy, became a school shooter. He says in 2001, his then 15-year-old son went to school with a .22 caliber revolver and 40 bullets in his backpack and opened fire on his classmates. Jeff recounts the tragic day and shares the signs he says he may have missed in his son. Then, go inside the mind of the shooter, when Dr. Phil speaks with Andy from prison. What does he say led him to want to perpetrate the shooting? Is he remorseful for his actions? Plus, Nicole and Jim say they’re so frightened of their 15-year-old son that they check in with each other up to 50 times a day to make sure each other is safe. Why does Nicole say she’s 150 percent sure her son is capable of killing someone? And, Kelly and Nick say their 14-year-old son is obsessed with guns and makes homemade bombs. They say when he gets angry, his behavior is out of control, and he lashes out to extremes. Kelly says she’s at her wits' end and is ready to turn their son over to the authorities. Hear why their son says he’s not violent, just misunderstood. If you fear your child is headed down a dark path, don’t miss the top warning signs.