Las Vegas was the site of what is now being called the deadliest mass shooting in American history last night, as 64-year-old Stephen Paddock, a local resident with no known affiliations to terrorism, opened fire on a gathering of thousands of people attending a country music festival on the Strip.

More than 50 people were killed, and more than four hundred more were injured before police were able to find the man’s elevated firing position on the 32nd floor of the nearby Mandalay Bay hotel.  It’s currently unclear whether officers shot and killed Paddock, or if he took his own life. In his room they found at least eight additional firearms, including a number of long guns.

“We have no idea what his belief system was,” Clark County Sheriff Joseph Lombardo said. “We’ve located numerous firearms within the room that he occupied.”

ISIS has claimed responsibility for the attack, insisting that Paddock was a recent convert to Islam. There are no indications of that being true.

Authorities had also been looking for Marilou Danley, reportedly Paddock’s roommate, but she is no longer considered a person of interest in this case.  According to law enforcement officials, she has been traveling, and went home for days leading up to the incident.  Thus far, no indication of Paddock’s role in the slaughter has been released.

“Marilou Danley is no longer being sought out as a person of interest,” the Las Vegas Metropolitan Police Department said. “LVMPD detectives have made contact with her and do not believe she is involved with the shooting on the strip.”

Law enforcement has yet to formally confirm, but witness reports seem to indicate that Paddock employed an automatic weapon in the attack, as concert goers recounted long stretches of rapid gun fire, followed by silence as Paddock presumably reloaded.

“It sounded like fireworks. People were just dropping to the ground. It just kept going on,” said Steve Smith, a 45-year-old visitor from Phoenix, Arizona, who had flown in for the concert.  “Probably 100 shots at a time. It would sound like it was reloading and then it would go again,” Smith said. “People were shot and trying to get out. A lot of people were shot.”