Another Day at the Office - Part 2 - S12.E27

The paddock at the lonely Biden farm has revealed the remains of three more murder victims, all teenage girls. Charlie Biden has already admitted to killing one, and is clearly the murderer of the others. His wife, Marie, frustratingly takes the high moral ground, until Charlie dies violently in custody, obviously by means of Marie. Mark takes the blame for this death as well and spins further into despair.