Michael Ribhi Kalla, 48, was last seen in Hawaii’s Puna district in October 2015. Initial police information placed him in Kalapana on October 5; a later NamUs entry lists his last contact as October 13 in Pāhoa. His family reported him missing on December 24, 2015, after extended silence.

Kalla’s last-known address was in Honokaʻa, though he frequently spent time in Pāhoa and Kalapana. Described as a Caucasian male about six feet to six-foot-one, 190–200 pounds, muscular, with green eyes and dark blond hair (reports vary between balding and shoulder-length), a beard and mustache, and a scar under his chin. He was reported to ride a maroon Kawasaki motorcycle, license plate 419 HNV. One account says he was with his girlfriend, a friend, and his brother in Pāhoa the day he was last seen.

The Hawaiʻi Police Department issued media releases and updated bulletins through 2016 and the case was entered into NamUs in August 2016. The investigation remains open and there has been no confirmed contact since October 2015. If anyone knew Michael or has information about his movements in Pāhoa or Kalapana in October 2015, please come forward.