Cannon was last seen at his residence in the 12600 block of Weir Street in Omaha, Nebraska sometime in late March 1995. He was involved with the Rainbow Family, a nomadic cult-type religious group, at the time of his disappearance. He has never been heard from again. Cannon was not reported missing until May 2004, nine years after he went missing; prior to then, the police had refused to accept a report. Few details are available in his case.