RedactedNarrative: Subjects were floating the Salmon River from Carmen to Tower Rock. Operator informed that the boat had taken on a lot of water as they were going around a bend in the river. The boat turned sideway and flipped. All three occupants were ejected from the boat. Operator informed he assisted his wife to shore. Operator informed his father  was holding on to the boat, and then let go to swim to the shore. Operator informed he observed Victim go out of sight under water. Operator then observed Victim caught up on a snag on the shore line. Operator informed he pulled Victim to the shore and observed Victim to be unresponsive and started CPR. Life saving measures were unsuccessful as Operator stated he and his wife went for help.  Operator indicated that victim had been drinking alcohol prior to incident.