What bones episode had a ghost in it?

it was an episode with thats kinda like the blair witch project and they find the video and start to restore it and then they find a person who knew the victim(s) and then at around the end its revealed he killed him/them then he gets on his knees to bones and says the witch lady made him do it and then they finally piece all of the film together and it does reveal that there was something there so wat episode was that