RedactedNarrative: On 05/15/2021 at approximately 9:00PM, I, Conservation Police Officer (CPO), was operating the Illinois Department of Natural Resources patrol boat and accompanied by CPOs on the Chicago River near Lake Shore Drive, Chicago. A 74'' Sunseeker Sport Yacht was observed without registration, contact was made with the operator, who was located at the top deck operating the vessel. The operator was advised we will have CPO board the watercraft for ease of communication. 
  
  I maneuver the patrol boat to the stern of the Sunseeker, CPO boarded the watercraft via the swim platform without issue. CPO remained on the watercraft for several minutes and it was determined the operator was unable to the required documentation. 
  
  CPO retrieved the operators driver license and advised the operator he would re-board the patrol boat and we will then follow him to City Winery. CPO was on the swim platform ready to re-board, I maneuvered the patrol boat back to the stern of the Sunseeker. CPO was advising me the distance from the platform as I drifted in slowly towards him. As I was maneuvering, the Sunseeker''s operator kept leaving the helm and walking down stairs to see where CPO was, CPO waved to the operator letting him know he was still on the swim platform. As CPO was ready to jump aboard the patrol boat, I kept the patrol boat still. CPO prepared to jump and that’s when the engines of the Sunseeker could be heard powering up, before I could adjust due to CPO boarding. 
  
  The Sunseeker reversed into the patrol boat making contact with the bow eye on the Sunseeker''s swimplatform. Minor damage was observed to the Sunseeker''s swim platform, no injuries occurred. After the boats collided, one of the employees on the Sunseeker noticed what occurred. I had to advise her to get the operator who appeared to not be aware of what just happened. He advised us that he was trying to straighten the vessel. We then followed the Sunseeker to City Winery to document what had occurred.
  
  The subject was able to provide all documentation showing the boat was registered in Florida. He was unable to get me passenger information, but did put in a request to a passenger and the CFO of the company that owned the boat. 
  