Using exclusive surveillance footage obtained from MGM Resorts, we pieced together the last days of Stephen Paddock, the Las Vegas gunman. He plays video poker, laughs with hotel staff and hauls bag after bag of weapons into his suite.

(ABC) Over a number of days after he checks into the hotel, he can also be seen coming and going at the hotel, bringing in luggage and bags.

(NYT) Over and over in the clips, Mr. Paddock is seen leaving the Mandalay Bay for his home in Mesquite, returning with a dark minivan loaded with suitcases. Over and over, valets take his keys; over and over, bellhops stack his luggage on gold carts, helping him transport at least 21 bags over the course of seven days. As they take the service elevator upstairs, Mr. Paddock chats with them. He cracks a joke. He tips.