Mark Constantino was an EVP (Electronic Voice Phenomena) specialist, best known for his paranormal expertise on the reality television series Ghost Adventures.

Hosted by paranormal researcher Zak Bagans, along with series regulars Aaron Goodwin, Nick Groff, Billy Tolley, and Jay Wasley, Ghost Adventures follows the investigators as they examine the most notorious and haunted places in the world. The series began as an independent, documentary-style film which aired on the Sci-Fi Channel in 2007, and centered on an investigation in and around Virginia City. The docu-series was picked up by the Travel Channel, which began airing episodes in 2008.

Mark Constantino and his wife, Debby Constantino, appeared on the series several times as EVP specialists, experts with the ability to find and interpret recorded sounds as spirit voices. Equipped with electronic gear such as EMF meters, video cameras and audio recorders, the Constantinos would explore haunted sites and uncover evidence of ghosts.

Their first appearance on the series was in 2008, for the episode “Old Idaho Penitentiary.” This was followed by appearances on three more episodes in 2009 and 2011: “Trans-Allegheny Lunatic Asylum,” “Washoe Club and Chollar Mine” and “Return to Goldfield Hotel.” The latter episode followed the return to the locations that launched the series and the careers of the ghost hunters in the original documentary film.

Mark Constantino died September 22, 2015, in Sparks, Nevada.