RedactedNarrative: On Sunday, 07/01/2018, CPO was patrolling Calumet Harbor (Calumet Park), along Lake Michigan.  At approximately 4:45 PM, CPO observed an individual being drug from the water near the north swim beach at Calumet Park.  The man, who was drug up onto the beach by two other individuals, appeared to be unconscious.  CPO approached the individual, and noticed a large laceration and swelling above his right ear. At that time, Subject began regaining and losing consciousness repeatedly.  CPO advised observers to retrieve ice for the swelling and began to administer first aid on Subject.  After checking for further injuries, CPO utilized a soft sternum rub to keep Subject from losing consciousness.  Chicago Fire (CFD) arrived on scene and began to administer medical care.  
  
  CPO made contact with eyewitness, who is Subject''s brother-in-law.  Subject2 stated Subject had been riding a jet ski (IL 3737 HF) within the break wall of the north swim beach.  As he attempted to pull the jet ski up to a dock, Subject accelerated rapidly, causing the bow of the jet ski to strike the metal break wall.  As a result, Subject was thrown off the jet ski, striking headfirst into the metal break wall.
  
  The jet ski sustained damage to the starboard bow and starboard stern.  Total value of the jet ski is estimated at $500..  Subject was transported by CFD to University of Chicago-Medical for medical evaluation and care at 5:05 pm.
  
  On Friday, 12/21/2018, Subject was issued written warnings for no valid watercraft registration and no fire extinguisher (WW L 422137).
  