RedactedNarrative: From my investigation and supporting facts, it appears V1 was traveling upriver (North) just south of the Laughlin-Bullhead City bridge, V1 failed to maintain a proper lookout while operating in close proximity to persons in the water and V2. V1 had been operating at slow speeds but upon approach to V2, the operator of V1 was scared and left off the throttle causing a loss of steering. This ultimately resulted in VICTIM who was swimming in the water at the transom of V2 assisting his passenger back onto V2, to be struck in the back of his head and back by V1. Upon impacts VICTIM''s head was pushed forward and impacted the transom of V2. 
  
  VICTIM was later transported by EMS from Fisherman''s Access Boat Launch to Western Arizona Regional Medical Center (WARMC). While at WARMC. VICTIM was diagnosed with a fractured mandible and loss of several teeth. The passenger on V2 did not sustain any injuries. 
  
  Both the operator of passenger of V1 did not sustain any injuries. 
  
  Additionally, the passenger of V1 was a juvenile female that weighed approx. 50 poounts and was wearing an Adult XXL Type III PFD which did not fit her.
  
  The operator of V1 was issued a citation for NRS 488.540 Rule 5: Failed to maintain a proper lookout resulting in an accident, and NRS 488.193 PFD improper size.