The murders of Channon Christian and Chris Newsom shocked Tennessee in 2007, leading to the conviction and life prison sentences of 4 people. But now a 5th person has been indicted. Nancy Grace looks at the new charges against Eric Boyd. She is joined by  lawyer Anne Bremner, private investigator Vincent Hill,  psychologist Caryn Stark, Juvenile Judge Ashley Willcott, and reporter Pamela Furr. Grace also digs into the case against an Arizona mom arrested after allegedly feeding her toddler mac and cheese laced with cannabis butter. Addiction expert Dr. William Morrone and lawyer & psychologist Dr. Brian Russell join the discussion.