A newly released coroner's report says Las Vegas gunman Stephen Paddock shot himself after killing 58 people at a country music festival in October.
Paddock died of a self-inflicted gunshot to the mouth, the Dec. 21 Clark County Coroner's Office report says. The coroner ruled his death a suicide, according to USA Today.
Paddock's suicide came after he committed the deadliest mass shooting in modern U.S. history on Oct. 1.
From his hotel room on the 32nd floor of the Mandalay Bay hotel, Paddock opened fire on country music festival goers across the street. Paddock killed 58 people and injured hundreds more, according to CBS News.
The coroner's report also confirmed all 58 victims died of gunshot wounds, according to USA Today. The coroner ruled each death a homicide.
According to the report, Paddock shot 16 of the victims in the head and six people were shot multiple times. One victim's cause of death was listed as a gunshot wound to the leg. Full autopsies were not included in the report.
Almost three months after the shooting, investigators are still working to determine Paddock's motive. Paddock's brain was examined during his autopsy but no abnormalities were found, according to USA Today.
On Dec. 20, one day before the coroner's office released its report, FBI Special Agent in Charge Aaron Rouse told the Las Vegas Review-Journal he expects the bureau will publish its findings within a year.
"[Our report] is focusing a large part on the why, OK?" he told the Review-Journal. "Which is what everybody wants to know."
"As I sit here today, I believe that we are learning as much as we possibly can about why the subject did what they did," Rouse added.
During a November interview with KLAS, Clark County Sheriff Joe Lombardo said Paddock, a wealthy investor and gambler, had been losing money since 2015, leading to "bouts of depression."
"This individual was status driven, based on how he liked to be recognized in the casino environment and how he liked to be recognized by his friends and family," he said. "So, obviously, that was starting to decline in the short period of time, and that may have had a determining effect on why he did what he did."
The FBI is combing through 22,000 hours of footage, 250,000 photos and about 40 terabytes of data to determine the most accurate motive possible.
"We didn't leave anything uncovered," Rouse told the Review-Journal. "And again, the casinos, with their support, let us track down a lot of information of who may have had contact with that person. And it was very helpful to us."