Sunday's mass shooting was the deadliest in United States history, killing 59 people and injuring nearly 500 more.
Sheriff Joseph Lombardo, of the Las Vegas Police, "More than 100 investigators have spent the last 72 hours combing through the life of 64-year-old Stephen Paddock, to produce a profile of someone I will call disturbed and unsafe".
The police have said she is not a suspect.
Prosecutor returns donation from lawyer in closed Trump case
Asked to comment on the timeline, Vance noted that he returned Kasowitz's campaign donation before meeting with him. A source told Politico that they've been using it "daily" and "pretty much... since they got here".
While many questions are left unanswered, what has become clear is that Paddock planned his attack meticulously.
TMZ reported Thursday that Paddock booked two rooms at the Blackstone Hotel, located across the street from Chicago's Grant Park, during the same period as the four-day festival.
While investigators do not believe Paddock conspired with an accomplice, they are looking into the possibility that others knew about his plot beforehand, Clark County Undersheriff Kevin McMahill said Friday.
The official said it was unclear whether Paddock ever used the room or was in Chicago at the time. Some of the weapons are believed capable of penetrating police armor.
"I can't get into the mind of a psychopath at this point", he said. Investigators say he brought close 23 guns - a dozen equipped with bump stocks to allow for the release of multiple rounds per trigger squeeze- with him when he checked into a suite at the Mandalay Bay Resort and Casino.