Mark Allan Keyes, a retired State Police Detective, is currently working as a private investigator. He is a speaker and instructor on paranormal investigation and as a parapsychologist, has been involved in over 200 resolution cases. Keyes is an expert commentator on Travel Channel’s Haunted Hospitals and Paranormal 911. Numerous PPA investigations have been highlighted on Travel Channel’s Paranormal Survivor and Destination America’s The Haunted. Author may be contacted through: www.theppa.net
Books by this Author
