RedactedNarrative: Owner of vessel #2 (Kayaker2) reported that he and his father (vessel #1, Kayaker1) had been kayaking on Chippewa River consuming alcohol and stopping to talk with other people along the river.  At one point Kayaker1 grabbed hold of a log in the middle of the river and because of the way they were side-by-side, caused Kayaker2 to overturn.  Kayaker2 told Kayaker1 to continue downstream and that he would meet up with him from the shoreline.  Kayaker2 then swam to the south bank of the river to empty his boots of water.  At this time Kayaker2 stated he lost sight of Kayaker1 and the kayaks.  Kayaker2 walked downstream along the bank and after approximately fifteen minutes saw the kayaks downstream.  He stated he noticed at that time that his father was not in his kayak, and that his kayak also appeared overturned.  When he caught up to the area where the kayaks were, he stated he saw what he believed initially were sticks or logs, but upon further inspection realized they were his father's boots.  He found his father underwater both unconscious and unresponsive.  He swam them both back to the south bank and began CPR and yelled for help.  Life jackets were not used.