RedactedNarrative: On June 6, 2014 at approximately 9:30 PM, Operator2 was fishing from his aluminum Jon boat on Lake Springfield near the Island Bay Yacht Club. During the same approximate time, a second vessel was eastbound from the Springfield marina, operated by Operator1 and occupied by his friend. Operator1 was operating at a speed greater than 15 mph, which was not allowed. V1 occupant indicated Operator1''s 50 HP motor was at least 3/4 to full throttle. V1 occupant also indicated Operator1 had consumed alcohol and smoked “a couple one hits” of cannabis. 
  
  Operator1 did not see Operator2''s vessel trolling northeast bound in the channel and collided with the rear of vessel # 2. Operator2 stated his navigational lights were on and operational at the time of the accident and leading up to the accident. When Sgt. arrived on the accident scene, he observed the lights were still illuminated, confirming the lights were on at the time of the accident. Two witnesses told me they spoke with Operator2 approximately 30 minutes before the accident, stating his navigational lights were on at that time. They also stated Operator2''s light were on post-accident, expressed in a written statement. 
  
  Operator1''s watercraft collided into the rear of Operator2''s vessel. Operator2 observed the approaching watercraft and jumped out of his jon boat in order to survive at approximately the same time of the impact. Operator1''s boat (V1) ramped Operator2''s vessel (V2). Operator1 and V1 occupant were ejected from V1, leaving all three in the water. Due to Operator1 not wearing his safety lanyard, V1 proceeded northeast approximately 50 yards and began to turn left sharply. V1 came back around to the port (left) side of V2, traveling in a counterclockwise circle now, and struck V2 approximately two (2) feet forward of the stern (rear) on the port side, causing V2 to capsize (flip over). V1 continued over V2, proceeded in a counterclockwise circle, and came back around to the capsized vessel. 
  
  The third time around the boat grazed the starboard side of the capsized vessel and Operator1 attempted to grab ahold of his vessel. Operator1 grabbed the starboard side of his boat but was unable to hold on. Operator1 was pulled under the vessel and sustained a deep laceration on his left forearm, suspected to be a propeller cut. Operator2 swam towards his capsized boat and climbed on top of it. V1 came around for the fourth time and Operator2 jumped into V1 and regained control. 
  
  Operator2 then used Operator1''s boat in order to rescue Operator1 and V1 occupant from the water. Springfield Police Department (SPD) secured the scene while Sgt. and I arrived to the Lindsay Bridge Boat Launch. Sangamon County ESDA towed V2 back to Marine Point where Sgt. relayed both vessels to CWLP and secured them. Cannabis was seized from V1 by Sgt. 
  
  Operator1 was transported to the hospital, where he was treated for deep laceration on the left arm suspected to be caused by the propeller of his own boat. None of the occupants were wearing PFDs at the time of the accident, but both boats had them available. I met Operator1 at Memorial hospital and arrested him for Operation of watercraft under the influence of drugs and alcohol. 
  
  Further investigation pending with additional charges possible.