Here’s a site that has some very good videos on how some evidence may be hoaxed: http://www.hauntedhoax.net.  I really like the questions he brings up at the end of his videos: did it really happen? Did you just want it to happen? Or did someone make it happen? Those are questions that investigators should ask themselves when reviewing evidence of any kind.

My hat’s off to Patrick Doyle and the videos he’s produced.