A mysterious piece of paper was found in Las Vegas shooter Stephen Paddock's hotel room

Investigators probing the deadly shooting rampage that unfolded on the Las Vegas Strip on Sunday night say that a piece of paper found in gunman Stephen Paddock's hotel suite was not a suicide note.

Still, there has been much speculation about what may have been on that paper. Police so far have not commented on that detail.

Clark County Sheriff Joseph Lombardo said during a news conference on Wednesday night that there was evidence to suggest Paddock had planned to get out of the Mandalay Bay Resort and Casino alive, but Lombardo refused to elaborate further on that point.

RELATED: What we know about Stephen Paddock

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What we know about Las Vegas shooting suspect Stephen Paddock
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What we know about Las Vegas shooting suspect Stephen Paddock
Stephen Paddock, 64, allegedly opened fire from the Mandalay Bay Resort and Casino on the Route 91 Harvest country music festival, leaving at least 59 people dead and hundreds injured.

(Social media/Handout via REUTERS)

He reportedly used a hammer-like tool to break out two windows at the Mandalay Bay Resort and Casino.

(Photo by David Becker/Getty Images)

Stephen Paddock was reportedly a high-stakes gambler that lived in a retirement community in Mesquite, Nevada.

(REUTERS/Las Vegas Sun/Steve Marcus)

His father was Benjamin Hoskins Paddock, a bank robber and former FBI Most Wanted Fugitive.

(FBI/Handout via REUTERS)

Paddock killed himself before authorities breached his hotel room and investigators say he acted alone.

(REUTERS/Las Vegas Sun/Steve Marcus)

Paddock's girlfriend, Marilou Danley, was in the Philippines at the time of the shooting but he reportedly used her identification to check in at the Mandalay Bay hotel.

(Las Vegas Metropolitan Police Department/Handout via REUTERS)

Stephen Paddock lived in this home in Melbourne, Florida from 2013 to 2015.

(Joe Burbank/Orlando Sentinel/TNS via Getty Images)

Police said Paddock had no criminal record.

(Photo by David Becker/Getty Images)

NBC News reported that Paddock made several large gambling transactions in recent weeks, but that it wasn't clear if they were wins or losses.

(Photo by David Becker/Getty Images)

Paddock reportedly purchased firearms at  Guns & Guitars, a gun shop in Mesquite, Nevada. 

(Photo by Gabe Ginsberg/Getty Images)

Paddock's brother, Eric, said his sibling belonged to no political or religious organizations, and had no history of mental illness.

 (Photo by Marcus Yam/Los Angeles Times via Getty Images)

Paddock's brother described him as a "wealthy guy" and said he liked to play video poker and go on cruises.

(Photo by Gabe Ginsberg/Getty Images)

He worked as an accountant and had real estate investments, according to the Washington Post. 

(Photo by Drew Angerer/Getty Images)

Paddock had his pilot license and owned at least one plane, according to Reuters.

(REUTERS/Lucy Nicholson)
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Lombardo, however, did reference Paddock's extensive planning — which included keeping a vehicle at the hotel, filled with explosive material and 1,600 rounds of ammunition. He also suggested the cameras Paddock set up inside and outside his hotel room were an indication that he wanted to keep eyes on the hallway, perhaps to fend off approaching officers.

Paddock fired multiple rounds through his room door and into the hallway when security guard Jesus Campos approached, wounding Campos in the leg. The gunman is believed to have killed himself as more police descended on his room.

Investigators have not publicly shared what motivated Paddock to carry out the rampage, now considered to be the deadliest mass shooting in modern US history. Fifty-eight people died, and hundreds more were injured.

In the days since the massacre, some news outlets have cited sources who said Paddock was taking anti-anxiety medication in the months before the massacre, but it was not clear whether that played a role in his actions related to the attack.

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