Sergeant John Sheahan at the Las Vegas Metropolitan Police Department has described the gun fight which lead up to a huge crash which killed three people on a busy junction.
He said a "rolling gun battle" preceded the crash.
More top news
Some dogs have been at the Battersea Dogs and Cats Home for more than a year. Can you make their Christmas and give them a new home?
Selfless Donna Wood from Staffordshire has left her husband and children at home so she can help save lives in Sierra Leone.
From Sierra Leone to Cyprus, 8,500 Christmas boxes were sent out to every serviceman and woman from the UK.