The FBI has concluded the investigation into the deadly mass shooting in Las Vegas on October 1, 2017, without coming much closer to determining the gunman’s motive than authorities were in the earliest days of the investigation.

From his suite at the Mandalay Bay Resort & Casino, Stephen Paddock opened fire on the large crowd attending the Route 99 Harvest Festival, killing 58 people and injuring hundreds more. Paddock, 64, took his own life as law enforcement agents closed in.

The Associated Press reports that federal investigators have closed the investigation into the deadliest mass shooting in modern U.S. history, without finding a specific motive for the massacre.

“It wasn’t about MGM, Mandalay Bay or a specific casino or venue,” Aaron Rouse, special agent in charge of the FBI’s Las Vegas brach, told the Associated Press.

“It was all about doing the maximum amount of damage and him obtaining some form of infamy,” Rouse said, adding that investigators believed Paddock acted alone.

Paddock was not known to be aligned with any particular political or religious ideologies, and was something of a loner, though he was in a relationship for years before the deadly shooting. A successful career gambler, Paddock spent much of his time inside casinos and was known as something of a high-roller.

The gunman did not leave a manifesto, note, or any indication on his electronic devices as to a possible motive. His internet search history indicated that Paddock had considered attacks at multiple other venues where live music events were happening, including a music festival in Las Vegas a week before the October 1 massacre.

[Feature image: AP Photo/John Locher]