Las Vegas
People scramble for shelter at the Route 91 Harvest country music festival after a gunman opened fire in Las Vegas on Sunday, October 1, leaving 59 people dead and more than 400 injured. Photo by David Becker/Getty Images

New details about Las Vegas shooter Stephen Paddock have emerged and may offer more insight into his behavior and personality prior to last week’s tragedy at the Route 91 Harvest festival. The information was contained in a 97-page court deposition for a civil lawsuit involving the gunman.

The deposition, which was obtained by CNN and published Monday, was part of a suit against the Cosmopolitan Hotel that followed a 2011 incident in which Paddock slipped on a walkway. While Paddock claimed during his testimony that he had no history of mental illness, criminal convictions or history of addiction, he was reportedly prescribed Valium “for anxiousness.” Paddock, 64, kept his prescriber Dr. Steven P. Winkler on “retainer.”

“He’s like on retainer, I call it, I guess,” Paddock said when asked about Winkler. “It means I pay a fee yearly ... I have good access to him.”

In another interesting reveal from the deposition, Paddock did confirm he had a concealed weapons license in Texas but was not asked to elaborate further on the topic of guns, according to CNN. He also talked of his gambling habit.

“Each time I push the button, it will range from $100 to $1,350,” he told a lawyer. When asked how high his bets would go, Paddock replied: “A million dollars.”

More than a week after the tragic shooting that left 59 people dead and more than 500 others injured, a motive for what’s become the deadliest mass shooting in modern U.S. history remains unclear. It was discovered that the 32nd-floor hotel room at the Mandalay Bay Resort and Casino, from which the gunman opened fire on a country music festival, contained a handwritten note with calculations for hitting the crowd.

The Clark County sheriff's office said that the attack was meticulously planned. Investigators found more than 40 firearms in Paddock’s hotel room and at his residence in Mesquite, Nevada. Ammo, optics, bipods, and a hammer reportedly used to smash through the hotel suite’s windows were also found and shown in pictures obtained by Fox-affiliate WFXT last week.

Clark County Sheriff Joseph Lombardo said last week that Paddock’s massive arsenal appeared to indicate he may have had an accomplice, though no such individual has been identified.

“You have to make an assumption that he had some help at some point,” Lombardo told reporters. “What we know is that Stephen Paddock is a man who spent decades acquiring weapons and ammo and living a secret life, much of which will never be fully understood.”