RedactedNarrative: Victim was stopped in vessel 1 while children swam near by.  For some reason the victim removed his phone and wallet and jumped in without a PFD to assist one of the children.  Once in the water the victim started to panic and became distressed.  The vessel operator described him as dog paddling back to vessel 1.  He was unable to put on a Type III PFD that was thrown to him.  The victim was able to get to the vessel but was unable to pull himself into the boat and the operator could not pull him in. The operator was  able to get the victim's leg hooked over a pontoon and secured the victim until help arrived.  During this time the victim started loosing consiousnesss and became unresponsive.  911 was called at this point.  A passing vessel stopped to assist and with several more people, they were able to get the victim into vessel 1.  The passengers then started CPR.  Ranger arrived and trasported the victim to the boat ramp while witnesses continued CPR  The victim was pronounced dead on the boat dock by EMS after several attemps to revive the victim.