RedactedNarrative: On the afternoon of May 3, 2015, I (CPO) was notified by Sgt. of a boat accident at Diversey Harbor B Dock. I arrived on scene at approximately 1:30PM.  Sgt. and CPO were already on scene.  
   
  A 23'' green and white Ebbtide Mystique (IL 3458 JK) was resting on top of dock with the engine off and the key in the ignition.  The boat appeared to sustain damage to it''s starboard bow and hull.  The boat''s owner was on scene when I arrived.  Owner stated she had been on the boat earlier in the day cleaning the carpet but had not taken the boat out of the harbor.  Owner stated she left the boat at 8:30PM on May 2, 2015.  When she left, the boat was empty and Owner had locked the cabin door and double checked the lock before she left.  Owner stated she kept a spare key locked in the cabin of the boat. Owner stated she proceeded to go to Home Depot then home.  She received a phone call at approximately 3:45AM notifying her there had been an accident involving her boat.  Owner did not know who took out her boat.
  
  A 24'' blue and white Bayliner in slip (IL 3342 KE), appeared to sustain damage to the port stern and port hull.  Scrapes were evident on the south and north sides of the main B dock. 
  
  Chicago Marine Unit responded to the initial call of a boat accident with property damage between 2:00AM and 2:30AM on May 3, 2015.  They interviewed two witnesses.  I spoke with Witness1 on May 3, 2015.  Witness1 stated that he was walking his dog with Witness2 near the golf course on the north side of the harbor when they heard a loud revving and turned to see a boat go over the dock.  When I spoke to Witness1 he stated that 3 subjects ran from the boat but he was unable to determine any distinguishing characteristics.  CPDMU''s report states that the witnesses saw two males, one wearing a white jacket, run west into the park.  
  
  As of this report I have been unable to contact Witness2.
  
  Attachments:
  CPDMU Report
  Photos
   