RedactedNarrative: The Pirates Choice was off the head pin to Snake Creek waiting for the drawbridge to open. A small vessel, FL 0902 ER, was circling the Pirates Choice and then proceeded to head directly toward the stern and make impact. The striking vessel then left the scene and ran aground on a nearby grass flat. On July 2, 2015, at approximately 1800 hours, dispatch advised of a boating accident that had occurred off the head pin of Snake Creek. They also advised that the striking vessel (V1) had fled the scene and run aground on a nearby grass flat. While en route, I contacted the reporting party, Captain, who was the operator of the struck vessel (V2). He advised me that he was heading to Coast Guard station Islamorada and that coast guard personnel were currently bringing V1 to the station. 
  
  Upon arrival, I observed the operator of V1 handcuffed and seated under the pavilion with emergency medical personnel assessing his situation. I asked one of the coast guard personnel where the striking vessel was located and what he observed. He proceeded to tell me that there were (4) coast guard personnel that responded to the scene. He stated the operator of V1, was unconscious when they arrived on scene. He said he got a ride by a good samaritan to the grounded vessel so he could assess the victim’s medical state. He stated that he flicked his eye, which woke him up. He then got the subject to the coast guard vessel and proceeded to drive V1 to the coast guard station. 
  
  Officers, both with FWC, arrived on scene to assist with the investigation. I asked Officer to get the information for all persons on board V1, as well as take pictures of all the damage to both vessels. Myself and Lt. proceeded to conduct a boating safety inspection on V1, as well as look for damage. I opened a cooler, located in front of the helm, and observed a 1.75 liter of Bacardi Gold Rum; there was approximately one inch left of rum, from the bottom, in the bottle. There was minimal damage to the center bow of the vessel; the safety inspection revealed no fire extinguisher and expired visual distress signals (flares). 
  
  I asked Captain, V2 operator, what he observed prior to Operator1 striking his vessel. He stated that Operator1 was driving circles around his vessel and that he asked him to stop and move further away for safety. He said V1 then circled around behind his stern and then proceeded to approach. He said he "bumped the throttle" to hopefully avoid V1 from striking his vessel; however, V1 made impact with the stern of his vessel and then rotated to the starboard causing a large gouge in the fiberglass. He said after impact, V1 proceeded north and ran aground in nearby grass flat. 
  
  After medical personnel were done with Operator1, operator of V1, and cleared him of any injury, I proceeded with a Boating Under the Influence (BUI) investigation; Operator1 was arrested for BUI.