I read that a good portion of it was attributed to hoax but certain key events suggest not ALL were. The case dates back to 1977 and some of the key witnesses have now passed on. There is so much documented on this case on the web, it's tough to discern truth, lies, facts or fiction anymore unfortunately. The web can't be trusted either way.
Regardless, #2 is out there because of the success of #1. It was a smash hit that grossed 318 million world wide and with a very low production cost success is inevitable with the second one. I remember reading that many other films came out after using the same tag line "Based on a true story" that the first Conjuring used in the opening credits hoping to cash in on the same success.
Edited by EVP, 11 June 2016 - 03:55 AM.