RedactedNarrative: Chicago Police Report was received - no accident cause was given as well as details of how it happened, if the fatal was the driver and if there was anyone else on the watercraft.  Watercraft info is not given as well.  I read a news story that states he was on a Jet ski at the time of accident and fell off.  It states he  "was part of a group that had been partying on the dock before he fell off the watercraft shortly before 9pm according to the Chicago Fire Department.  He had no flotation gear and was submerged in the water for about 20 minutes before emergency responders located him".