MESQUITE, Nev. — Stephen Paddock lived in a tidy Nevada retirement community where the amenities include golf, tennis and bocce. He was a multimillionaire real-estate investor, recently shipped his 90-year-old mother a walker and liked to travel to Las Vegas to play high-stakes video poker.
Nothing in his background suggests why he would have been on the 32nd floor of the Mandalay Bay Hotel and Casino with at least 10 guns on Sunday night, raining an unparalleled slaughter upon an outdoor country music festival below.
"I can't even make something up," his bewildered brother, Eric Paddock, told reporters Monday. "There's just nothing."
At least 58 people were killed and more than 500 injured in Paddock's attack on the Route 91 Harvest Festival, where country music star Jason Aldean was performing for more than 22,000 fans. It was the worst mass shooting in modern U.S. history. The 64-year-old gunman killed himself in the hotel room before authorities arrived.
The Islamic State group claimed responsibility, without offering evidence, but Aaron Rouse, the FBI agent in charge in Las Vegas, said investigators saw no connection to international terrorism.
Asked about a potential motive, Sheriff Joseph Lombardo said he could not "get into the mind of a psychopath at this point."
Public records offered no hint of financial distress or criminal history. Eric Paddock, who spoke with reporters outside his home near Orlando, Florida, said even if his brother had been in financial trouble, the family could have bailed him out.
"No affiliation, no religion, no politics. He never cared about any of that stuff," Eric Paddock said as he alternately wept and shouted. "He was a guy who had money. He went on cruises and gambled."
Stephen Paddock, who had worked previously as an accountant, was "not an avid gun guy at all," though he had a couple of handguns and a long gun, he said.
Eric Paddock also told The Associated Press that he had not talked to his brother in six months and last heard from him when Stephen checked in briefly by text message after Hurricane Irma.
Their mother spoke with him about two weeks ago, and when he found out recently that she needed a walker, he sent her one, Eric Paddock said.
"She's completely in shock," he said.
Eric Paddock recalled receiving a recent text from his brother showing "a picture that he won $40,000 on a slot machine. But that's the way he played."
He described his brother as a multimillionaire and said they had business dealings and owned property together. He said he was not aware that his brother had gambling debts.
"He had substantial wealth. He'd tell me when he'd win. He'd grouse when he'd lost. He never said he'd lost four million dollars or something. I think he would have told me."
Heavily armed police searched Paddock's home Monday in Mesquite, about 80 miles northeast of Las Vegas near the Arizona border, looking for clues. Paddock lived there with his 62-year-old girlfriend, who authorities said was out of the country when the shooting happened. Eric Paddock described her as kindly and said she sometimes sent cookies to his mother.
Police also searched a two-bedroom home Paddock owned in a retirement community in Reno, 500 miles from Mesquite.
While Stephen Paddock appeared to have no criminal history, his father was a notorious bank robber, Eric Paddock confirmed to The Orlando Sentinel. Benjamin Hoskins Paddock tried to run down an FBI agent with his car in Las Vegas in 1960 and wound up on the agency's most wanted list after escaping from a federal prison in Texas in 1968, when Stephen Paddock was a teen.