Look up the Dibbuk Box. Oh snap. No. That's The Posession. ... Which I haven't seen.

The Cnojuring is based on what happened to the Perron family in Rhode Island. From what I've read, the story is based from Lorraine Warren's point of view. You know, the spiritual whatever lady that helped investigate the Amityville Horror house. It happened in the 70's, back when Ed & Lorraine were, I guess, at their most active. I'm sure they continued their work for a long time and I'm not sure if Lorraine has retired by now or not, but I know that she sometimes speaks at panels and such and Ed passed away at some point.