Duane "Dog The Bounty Hunter" Chapman proposed to Beth, died of cancer, RadarOnline.com has learned.br br In a shocking trailer for Dr. Oz — set to air on February 3 – Duane, 66, can be seen asking his girlfriend, Moon Angell, to be his wife.br br "Moon Angell will you marry me?" he asks.br br "I am a lot happier with her around," Duane tells Oz.br br Duane’s daughter later spread to her lungs, resulting in a stage 4 diagnosis. On June 22, 2019, while filming the show with Doug, she was hospitalized and placed in a medically-induced coma. She died four days later from complications. She was 51.br br Doug said goodbye to his beloved in a beautiful Hawaiian memorial service, and later, in a Colorado funeral, surrounded by their family.