Joe Nickell, in his book Secrets of the Supernatural, gives an account of this event he got from Larry E. Arnold's article "The Flaming Fate of Dr. John Irving Bentley," printed in the Pursuit of Fall 1976.
Paranormal investigator Joe Nickell discovered many of the reported ghost activities were due to the activities of the late night clean up crew.
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In March 2002, The Skeptical Inquirer published a sting operation performed by former magician and prominent skeptical paranormal investigator, Joe Nickell.