RedactedNarrative: Both vessels rented by family group. Both operators did not have required Nevada Boating Safety certificate or training. Vessel 02 was returning to rental dock at Las Vegas Boat Harbor. Operator (OPERATOR2) states he slowed to slow coast as he approached marina tire breakwater line. Vessel 01 was following Vessel 02 and failed to notice it slowed. Bow of Vessel 01 collided with stern/engine of Vessel 02 at approximate speed of 10-15 mph. Operators stated no injuries to occupants of either vessel. 
  
  Vessel 01 sustained damage to bow decking and plates, along with bending front of pontoons. Approximate damage $400. Vessel 02 sustained damage to engine (destroyed engine cover and bent lower unit), along with damage to stern railing and skirts. Approximate damage $2480. 
  
  All occupants of vessels had left the dock prior to arrival of investigating officer. Vessel operators became increasingly uncooperative during the investigation and refused to provide occupant information. Various family members then began to interfere in the investigation and investigating officers decided not to press the issue to prevent a riot. Vessel operators came to financial understanding with the vessel owner to cover part of the damages to vessel, then departed the area.