RedactedNarrative: 4 occupants aboard a rental canoe capsized.  They were pulled out of the water and taken to shore by chase boat and a good Samaritan kayaker.  All were wearing pfd's.  The operator's pfd was not secured properly.  It was not zipped only connected by the middle of 3 straps.  Operator was injured.  Officer tried to find out hull number and year but by the time he arrived to the scene canoe had been put away with all the rest of their canoes.  The rental company has several canoes the same size and make so the particular canoe couldn't be identified by personnel.  10/2/14 Received operator's report and victim stated that he and his son did not know how to swim.  His life jacket was too small and did not close.  They were in the water for about 20 minutes before they were rescued.