Calhau was last seen by his wife at their home on Mokulele Drive in Kane'ohe. He had told her he was going to a friend's home in Kalihi, but never returned. Calhau's 1992 brown Ford pickup was found the following day in Aiea on Koauka Street near Our Savior Lutheran Church on Moanalua Road. Police say that there is no foul play. His body was never found.