On 09-13-2010, I, CPO  was assigned a boat accident that occurred on 08-27-2010 at 11:00 PM. The location of the accident given was 1 mile east of Northerly Island on Lake Michigan.
     On 09-14-2010 I contacted (54), owner/operator of (Boat # 1),at Hammond Marina. I did a boat inspection which included navigation lights and took photo''s of damage to his boat . 
      operator''s stated his boat was going approximately 17 M.P.H. with a plaining angle of 10 degrees heading northwest, the water was calm with one foot waves on a dark night and clear skies. At approximately 10:30 PM operator advised that he heard a loud "Bang ", and felt a shudder. He asked  "what was that?" occupant replied "I think we just hit a boat". operator said he thought boat#2 was traveling in a southeasterly direction at approximately 30 to 50 M.P.H.when he hit the boat.  He looked astern of his boat and saw "Scott Free"(Boat # 2), dead in the water approximately 200 feet away. operator approached the boat and asked if anyone was injured? The Operator of boat #2 advised that everyone was ok. operator stated that both boats were drifting and noticed that boat #2''s transum (stern light (white)and starboard (green) light were on. the mast light (white ), up high and the port light (red ) were not on. operator advised the operator of boat #2, he was going to contact the coast guard about the accident,  the operator of boat#2 said to go ahead and call. operator explained that while making the call , boat #2 was in the area for approximately 5 minutes before it fled the scene of the accident heading south. He continued to desribe the accident to coast guard and they transferred the call to the Chicago Police Marine Unit. 
      The marine unit advised operator to go to the nearest harbor(Burnham),where a police report  was completed. The Marine unit then proceeded to Jackson Park Harbor,attempting to locate boat #2.
       The marine unit report indicates that they were unable to locate boat #2 at Jackson Park Harbor.They returned to their headquarters and were advised that boat #2 was at 59th St. Harbor. The Reporting officer called the owner of boat#2 by land line, and advised that his boat was blind sided by boat#1 and had extensive damage to the port side rear quarter. The owner also stated that all navigation lights were functioning until the accident. They left the scene because he thought he might be taking on water.       
        On 09-21-2010, at approximately 1:00 PM, I met with Operator2 at Millenium Marina,just west of Torrencce ave at the Calumet River. The owner/Operator, Operator2 arrived and then the other owner, , when owner stepped out of his vehicle, he took a battery from the vehicle and put it on the boat in the battery compartment. I advised both owners to turn on the navigation lights when the battery was connected. When the lights were turned on, the port (red) light was on.The mast light anchor lights were not on. I advised both owners to take off the mast lights and give them to me.(I took them for evidence). I then took photo''s of the damage to the boat at the port rear quarter.(see photo''s attached).I gave blank statement sheets to Operator2 and advised him to contact me when his statement was completed. (Statement attached)

See attached supplemental report for further.
Chicago                       