Stephen Craig Paddock, 64, shot himself in the mouth after he killed 58 people and wounded over 500 attending an outdoor concert in Las Vegas in October

Answers about why Stephen Paddock carried out the Las Vegas shooting likely won't be answered for another year, the head of the FBI's Las Vegas office said Wednesday.

Special Agent in Charge Aaron Rouse told the Las Vegas Review-Journal that they probably won't brief the public until shortly before the tragedy's first anniversary, in October 2018.

'Now that’s a long time for some people, but speaking for the FBI, that’s light speed, all right?' Rouse said.

Other law enforcement agencies will also be releasing reports on the massacre, but Rouse says the FBI's report is the one everyone will be interested in because it deals with why Paddock carried out the attack.

So far, Rouse says nothing indicates that Paddock was working with anybody.

Rouse went on to say that it took FBI investigators 14 days to comb the scene of the shooting, and another 13 to go through the Paddock's sniper's nest hotel room and the hallway outside it where he fired at responding SWAT teams.

All of the evidence was sent back to the FBI's headquarters in Quantico for analysis.

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All 58 victims of the Las Vegas mass shooting died of gunshot wounds, a coroner said Thursday, revealing that no one was trampled to death trying to escape from an outdoor concert that turned into a massacre. The image above shows people running for cover after gunfire was heard on October 1

The FBI interviewed about 400 people in the course of the investigation, and brought on the same amount of specialists to go through the evidence.

Among the evidence that they are working through is 22,000 hours of surveillance and cellphone footage, and 250,000 photos.

'We’re going to have, I think, the best digital schematic of what happened and where it happened and how it happened that you can come up with,' Rouse said.

Rouse's interview comes as the Clark County Coroner released the causes of death in all of the 58 victims - as well as Paddock himself.

FBI Special Agent in Charge of Las Vegas Aaron Rouse (pictured) says putting out a report in a year is working at 'light speed' for the Bureau

Coroner John Fudenberg said that Paddock died by shooting himself in the mouth as SWAT teams knocked down his hotel room door. His death was ruled a suicide

He also revealed that all 58 of Paddock's victims died of gunshot wounds, and none were trampled as was initially feared.

The deaths in the deadliest mass shooting in modern US history were all ruled homicides.

Twenty-one people were shot in the head, 36 died with chest and back wounds and one died of a gunshot to the leg, according to a chart the coroner released. Four victims had multiple gunshot wounds.

Authorities have said more than 500 people were injured when Paddock, a high-stakes video poker gambler, unleashed gunfire from an upper floor of a high-rise casino hotel onto an outdoor country music festival below.

Some have described receiving injuries other than gunfire during their escapes.

Police and the FBI have not said publicly what they think motivated Paddock to amass an arsenal of assault-style weapons and ammunition in a two-room suite and then rain bursts of gunfire for 10 minutes from the 32nd floor of Mandalay Bay into a crowd of 22,000 people at the Route 91 Harvest Festival below.

Twenty-one people were shot in the head, 36 died with chest and back wounds and one died of a gunshot to the leg, according to the coroner. Four victims had multiple gunshot wounds. People embrace near a makeshift memorial at the entrance to Las Vegas on October 5

They also haven't said why they think he stopped shooting. They say he killed himself before officers reached his room.

Clark County Sheriff Joe Lombardo said last month that Paddock fired more than 1,100 shots.

Authorities also reported finding about 4,000 unused rounds along with the 23 guns in the suite.

Fudenberg said autopsy reports in the case are not yet complete.

Paddock's brain was sent to Stanford University in California to study after a visual inspection found no abnormalities.