RedactedNarrative: Operator of vessel #1 had cruised over to the mouth of the Clinton River and parked so passengers could swim late in the evening around 12:15 am.  The boat had drifted while victim and another passenger were swimming.  One swimmer made it back to the boat.  Victim went missing and was presumed drowned.  Operator and other passengers on the vessel attempted to locate the victim unsuccessfully. The boat operator was arrested under suspicion of operating while intoxicated. Victim was located around 9:15 pm the following evening.  No other injuries were reported.