In 2011, Josh Young, 15, was charged with murder in the brutal beating death of his 14-year-old stepbrother, Trey Zwicker -- after his father, Joshua Gouker, turned him in. But a year later, while Josh awaited trial in a juvenile correction facility, Gouker confessed to the murder. It was still believed that Josh had a role in the crime, and he was put on trial for -- and eventually acquitted of -- complicity to murder and tampering with evidence. Now, in an exclusive interview, Josh sits down with Dr. Phil. Find out why he says he barely knew his father. And, what does he say happened on the night Trey was killed? Then, hear the chilling courtroom testimony from Gouker on why he says he killed Trey. Plus, Trey’s father, Terry, faces Josh on Dr. Phil’s stage. Why does he believe the teen is lying? How does Josh explain the alleged inconsistencies in his statements to police? And, Dr. Phil speaks with Gouker via telephone from prison. Watch as Gouker drops yet another bombshell about wh