RedactedNarrative: From an earlier facebook post it appears Victim1 was the operator and was not wearing a pfd.  Victim2 the passenger did have one on but did not have the waist strap secured at the time.  
  
  From a witness statement and my calculations the boat was overloaded and a sudden stop or especially a sharp right turn could have caused the boat to swamp over the transom.  Without any floatation in the boat it would have sank rapidly.  Victim1 and Victim2 were found nearby the boat's location.
  