Jack Oliver is the founder of Southern Indiana Ghost Hunter’s Network, called SIGN for short. Jack has been investigating for upwards of 18 years and only uses the scientific approach to investigating. Because of his knowledge, experience, etiquette, and community service, Jack, along with his co-founder Beverly Leavell and his group are well rounded and respected in the paranormal community. Jack founded his first group back in 1994 before investigating was in the mainstream.