Netflix’s Cold Case: Who Killed JonBenét Ramsey explored whether early suspicion directed at the 6-year-old’s parents, John and Patsy Ramsey, irreparably muddied the investigation. John Ramsey was shaving on the morning of Dec. 26, 1996, when he heard his wife scream. Patsy Ramsey was headed to the kitchen to put the coffee on, but instead found…