Two vessels involved.  One boat and one pwc, both pulling two occupants on tube.  Boat made evasive manuevers to avoid pwc, however occupant on tube behind boat struck pwc.  Boat Accident Investigation by Game Warden .

Fort Worth Police Department report #  09-68907
      (Fort Worth Marshall's Office-Lake Patrol)

Tarrant County Medical Examiners report #  0907408
Fort Worth                    