Simon Owen, 21, was a Texas Wesleyan University student who traveled to Oahu in the summer of 1994, rented a room in Honolulu and took a job in Waikiki. An avid hiker and experienced in wilderness survival, he enjoyed exploring the island’s natural areas. He was 6 feet 0 inches, about 155 pounds, with brown hair and brown eyes, a Christian fish tattoo on his right ankle and scars on his neck, left shoulder and right hip.

Reports vary on the exact date of his disappearance, but he was reportedly last seen in late June 1994, possibly near a pond on the Manoa Falls Trail. He didn’t show up for work and a few days later his bicycle was found locked to a tree at the trailhead. He may have been wearing beige shorts and carrying a maroon backpack. A large search involving the Honolulu Police Department, volunteers and a privately funded helicopter turned up no trace. Authorities said foul play was not suspected and officials suggested an accidental fall from a high point on the trail was possible.

Simon has never been heard from again. Does anyone who knew him or who hiked Manoa Falls in June 1994 have information that could help explain what happened?