The family of 19-year-old Jake Limberios continues to search for answers surrounding his death in March 2012. Who fired the gunshot that ended his life? Brittany and Will, who witnessed the shooting, say Jake, a gun enthusiast, accidentally shot himself in the head. Although the coroner ruled his death a suicide, Jake’s parents, Mike and Shannon, say their son, a young father, never would’ve taken his own life. Left with so many unanswered questions, Jake’s parents had his body exhumed and autopsied by renowned forensic pathologist Dr. Cyril Wecht, who concluded that Jake’s cause of death wasn’t suicide. Dr. Phil speaks with Dr. Wecht via satellite -- hear why he says Jake couldn’t have shot himself. Plus, Brittany and Will say they sympathize with Jake’s parents but are tired of being under suspicion and agree to take polygraph tests to prove they’re not hiding any details about Jake’s death. What will the results reveal? And, Mike and Shannon say their marriage has grown strained sin