Ed left the doll next to his desk; it began levitating. That happened a couple of times and then it seemed to just quit, finally laying quiet. But in a couple of weeks Marie was back to her old tricks; she started appearing in different rooms in the Warren home. Sensing that the doll was ramping back up the Warrens called in a Catholic priest to exorcise Marie. The priest didn't take it seriously, telling Marie "You're just a doll. You can't hurt anyone!" Big mistake: on his way home the priest's brakes failed, and his car was totaled in a horrible accident. He survived.
Eventually the Warrens built a locked case for Marie, and she resides there to this day. The locked case seems to have kept the doll from moving around, but it seems like that whatever terrible entity is attached to it is still there, waiting. Biding its time. Ready for the day when it can again be free