RedactedNarrative: Two males went underway on the Snake River in the evening hours. Both fell overboard and were not wearing personal flotation devices. One male swam to a nearby island and called for help. First responders arrived in the area and conducted a search and rescue. One male was located on an island, the second male was located the following day floating on the river, deceased. The vessel was not recovered.  The operator/victim had been drinking alcohol.