Mark Keyes, a retired Pennsylvania State Police Detective now Private Investigator with a background in psychology, is the Director of the Pennsylvania Paranormal Association, a paranormal resolution team, author of CHASING SHADOWS: A CRIMINAL INVESTIGATORS LOOK INTO THE PARANORMAL, and has been frequently  featured on several televisions shows in the US, UK and Canada, including The Haunted, Paranormal Survivor, Haunted Hospitals and Paranormal 911. Mark has done research in paranormal phenomena for over 15 years.