Hans Holzer (26 January 1920 - 26 April 2009) was an Austrian-born, American pioneering paranormal researcher and author. He wrote well over 100 books on supernatural and occult subjects for the popular market as well as several plays, musicals, films, and documentaries, and hosted a television show, "Ghost Hunter" (not to be confused with Ghost Hunters, a separate show).
Holzer's most famous investigation was into The Amityville Horror case. In January 1977, Holzer and spiritual medium Ethel Meyers entered 112 Ocean Avenue in Amityville, New York. Meyers claimed that the house had been built over an ancient Native American burial ground and the angry spirit of a Shinnecock Indian Chief - "Rolling Thunder" - had possessed the previous occupant, Ronald Defeo Jr., driving him to murder his family. Photographs taken at the scene revealed curious anomalies such as the halos which appeared in the supposed images of bullet marks made in the original 1974 murders. Holzer's claim that the house was built on Indian sacred land was, however, denied by the local Amityville Historical Society and it was pointed out that it was the Montaukett Indians, and not the Shinnecocks, who had been the original settlers in the area. However, Indian burial sites have been found all over Long Island, including Amityville, so no one has been able to confirm or deny the burial of an Indian chief on or near the 112 Ocean Avenue property. Holzer went on to write several books about the subject, both fiction and non-fiction.