Clark County Sheriff Joe Lombardo told reporters Friday that investigators believe Las Vegas gunman Steven Paddock acted alone in the Oct. 1 shooting at the Mandalay Bay casino-hotel.
The sheriff said investigators have not uncovered a specific reason why Paddock decided to open fire from his highrise hotel suite, killing 58 people and wounding hundreds as a country music festival was held below at street level. Paddock was later found dead in his room.
Lombardo said he does not expect charges to be filed against Paddock’s girlfriend, who previously had been called a person of interest in the case.
He did say the FBI is investigating a person of interest with respect to the case, but that person is not his girlfriend and did not participate in the shooting.
Lombardo said the investigation found that Paddock had possessed child pornography.
“This is a very heavy, resource-driven investigation,” he said.