Was someone else in the room with Las Vegas shooter Stephen Paddock?
That’s what investigators are trying to determine, senior law enforcement officials told NBC News on Friday afternoon.
He was registered at the Mandalay Bay Hotel and Casino.
A phone charger that doesn’t match any of Paddock’s cellphones was discovered in his room, they said.
Garage records also show that during a period of time when his vehicle left the Mandalay Bay hotel garage, one of his room key cards was used to get into the room.
They said there “are several possible explanations for these anomalies,” according to NBC, which added that “they want to get to the bottom of it.”
Officials further elaborated on his gambling habits, saying he was successful, earning at least $5 million in 2015. Officials said that most of it came from gambling, and citing his IRS records for that information.
Paddock, 64, is accused of killing at least 58 people and wounding hundreds more on Sunday night as he fired down on them from the 32nd floor of the hotel. The people were attending an outdoor country music concert.
According to the NBC report, law enforcement officials say that his motive is still unclear. He researched possible attack locations in Boston and Chicago, where the Lollapalooza festival was held in August.
“Nobody knew him. I literally never saw him,” said a neighbor who lives two doors down from Paddock’s home and who declined to be named. “The house was so quiet, we thought they were snowbirds,” he added, referring to retirees who spent the winter months in warm-weather places like Mesquite, as Reuters reported.
Garbage cans were put out on the street before anyone else was even awake, leaving no opportunity for casual chats with neighbors living just feet away. Yard work was done by gardeners. Pizza came directly to the door, and as far as anyone knew, Paddock never took part in bingo or bocce, or any of the social activities provided by the retirement community.
By all accounts, Paddock was a man of few words who never sought to interact with others beyond his live-in companion, Marilou Danley, a 62-year-old former casino employee described by authorities as a person of interest in the investigation.
Neighbors immediately next to Paddock’s mustard-colored stucco home, landscaped with stones and desert plants, displayed a sign on their door: “We did not know him.”
Court records show that he got married in 1977. The couple separated in 1979 before their divorce was finalized in 1980 in Los Angeles County.
Five years later, Paddock married again, separating in 1989 and divorcing in 1990, also in Los Angeles County, according to court and public records.
In both cases, divorce papers cited irreconcilable differences.
Reuters contributed to this report.