Aidan Bristow

A mother steps forward with valuable information for the BAU to aid in their investigation of an UnSub known as the Bone Crusher. Also, Reid must adapt to a new set of rules in prison life.

After Hodgins and Angela are drugged and wake up to a bloody corpse hanging in the canopy of their bed and flower petals around their son Michael's crib, they are forced to believe that Pelant is back for revenge against Hodgins.