Paddock was found dead in the room, and over the course of the investigation, police had named Marilou Danley - his girlfriend - as a person of interest.
According to Danley, she remembers Paddock "as a kind, caring, quiet man".
"She was probably one of the only people I've ever seen that he'd go out of his way to do a little thing for".
"I was grateful, but anxious", Danley said, adding that she thought the flight to the Philippines and the money was his way of breaking up with her.
Besides the casualties, a total of 489 people were injured in the attack, and 317 have been released from hospitals.
Paddock took his own life as police closed in.
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Lombardo mentioned cameras that Paddock had rigged inside and outside his hotel suite on the 32nd floor of the Mandalay Bay Resort and Casino - a tactic seen by investigators as a means to monitor and fend off law-enforcement officers in the hotel hallway. Police said they believed he had used 10 suitcases to smuggle the weapons up to the room.
"We anticipate some information from her shortly", Clark County Sheriff Joe Lombardo stated on Tuesday. "She was sent away.so that she will not be there to interfere with what he's planning", they said.
"I know that she doesn't know anything as well like us", one of Danley's sisters, who chose to remain anonymous, told Australian news outlet Seven News.
In the statement, read by attorney Matthew Lombard outside the Federal Bureau of Investigation field office in L.A., the 62-year-old said, "I am devasted. and my prayers go out to the victims and their families.my heart breaks for all who have lost loved ones". Through her lawyer, Danley insisted she thought this was Paddock's way of preparing her for a breakup.
Some, in law enforcement, remain convinced that Paddock, 64, didn't act alone.