>> they worshipped charlie like a god. >> in the days after the murders, charlie seemed dangerous and unhinged. >> he was almost in a frantic state, i would say. he was very worried. >> and so was hoyt. she knew something was very wrong. but she didn't know what. and neither did police. it would be months of false leads and missed opportunities for them to unravel the mystery of the seven savage murders. >> in the case of this nature where you have so many people who are dead, and then you try on find out, who did they know? where do you start? >> hunting a monster when we come back. everyone needs protein, every day. there are more than 20,000 different proteins in the human body. they fuel our energy, support our metabolism, amplify our performance and recovery. they're essential for good health. your body's best source for protein?