A note found in the hotel room of the man who shot into a crowd from his perch in a Las Vegas high-rise included hand-written calculations about where he needed to aim to maximize his accuracy and kill as many people as possible.

In an interview airing Sunday on "60 Minutes," three police officers who stormed Stephen Paddock's hotel room in the Mandalay Bay hotel tell correspondent Bill Whitaker new details about the deadliest mass shooting in modern American history. The officers were the first to see Paddock's body and the arsenal of weapons and ammunition he had stockpiled.

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