They have also been investigating his background, and while, according to Federal Bureau of Investigation spokesperson Aaron Rouse, no link to worldwide or domestic terrorism had yet been found, there are still many unanswered questions about Paddock’s history.

Paddock bought 1,000 rounds of the.308-caliber and.223-caliber tracer ammunition from a private buyer he met at a Phoenix gun show, a law enforcement official not authorized to comment on the investigation said on condition of anonymity.

The Clark County official said the authorities have looked at gunman Stephen Paddock’s personal life, political affiliation, economic situation and any potential radicalisation. And while trying to solve that question, police have also sought to determine whether anyone knew about the attack, McMahill said.

A note discovered in the hotel room of Las Vegas shooter Stephen Paddock featured hand-written calculations on where he needed to aim to increase his accuracy and number of kills, United States network CBS reported Saturday.

The official also disclosed that Paddock took at least a dozen cruises overseas in the last few years, majority with his girlfriend, Marilou Danley.

That night, Paddock used his room on the 32nd floor of the Mandalay Bay Resort and Casino to fire onto an unsuspecting crowd at the Route 91 Harvest country music festival. 59 people have been confirmed dead, and another 500 were injured in the attack.

Tannerite was previously found in a vehicle Paddock parked at the Mandalay Bay and in another of his homes, in Mesquite, Nev.

“I am devastated by the deaths and injuries that have occurred and my prayers go out to the victims and their families and all those who have been hurt by these bad events”. Police have yet to identify a motive.

If you know something, say something“, said Aaron Rouse, agent in charge of the Las Vegas FBI office. It honored Charleston Hatfield, 34, a Las Vegas police officer who was shot to death during the assault. Paddock had set up a camera in the hallway, apparently to watch for approaching authorities.

The investigators believed that the 64-year-old gunman, Stephen Paddock’s girlfriend would be the key in understanding the motive for which Paddock has become the mass murderer. The open design of the city’s main casino area has always been regarded by security experts as a potential target, the Nevada Independent reported.

“This one is somewhat different than numerous ones we’ve dealt with in the past, because we don’t have any immediately accessible thumbprints that would indicate the shooter’s ideology or motivation, or really what compelled him to get there”, McCabe said.

The shooter in the Las Vegas deadly massacre apparently planned to survive and escape in the moments after the massacre, but investigators did not specifically say how he meant to do that.