Most reasonable people are naturally a bit skeptical when they hear a story about some demonic possession or infestation.

That's one reason why this man has come forward with his story, because he now believes in the classic struggle between God and the Devil after experiencing unpleasant and downright scary events in his Pennsylvania home.

Bob Cranmer has even written a book about his experiences because he thinks people will think twice because of his credibility.

A few weeks ago we shared with you another story of demonic possession that gained national attention.

It's suggested in this documentary, that without personal experience, it's easy to be very skeptical about the existence of evil spirits.