Fish and Wildlife Conservation Commission to assist in the investigation . Boat crashed into tugboat , barge and dock under construction . Five people killed ; remaining were taken to hospital with serious injuries . Crew had to use plywood ladder to reach the passengers .
Fish and Wildlife Conservation Commission takes lead in the investigation . Boat crashed into tugboat , barge and dock under construction . Five people killed ; remaining seven taken to hospital with serious injuries . Rescuers had to use plywood panels to reach the passengers .