RedactedNarrative: Subject and Victim had rented a kayak from a state park to go on the Sheyenne River.  The park has a pick up spot on the river where they were supposed to meet the ranger when he arrived the male was on shore and the female was heading downstream and got caught in the low head dam. The Ranger tried to rescue the female with a throw bag but the current would suck it under before she could reach it. Subject was wearing a life jacket, Victim was not.  According to Subject they had tipped the kayak earlier and were able to get back in after emptying it on shore.  They decided to go back out and tried to paddle back upstream to the pickup dock when they tipped the kayak again. Victim was not wearing her lifejacket because she "was a good swimmer".  Subject did not know to swim.