Having met Paddock, 64, himself once, Paddock added: "He wasn't very sociable". In 1959 and 1960, he robbed two banks in Phoenix before being arrested in Las Vegas and be sentenced in 1961 to 20 years in prison.
Eric Paddock said his brother was never an "avid gun guy" and didn't have any background in the military.
Another neighbour Maria Alameida said the mother had moved into the home in 2004, saying: "We'd always have parties and now I'm thinking about how we could have made him mad".
The wife of Stephen Paddock, a time desired by the forces of the order, was located "abroad", he said.
The gunman who shot 59 people at a Las Vegas country music concert may have been originally planning an attack at another music festival just one week earlier, the Daily Beast reported.
He bought firearms in the past but legally, claimed the authorities.
"We have to establish what his motivation was first", Lombardo said. "Before we label with that, it'll be a matter of process". It has so far believed that he acted alone and that he has no connection to terrorist groups.
Las Vegas shooter Stephen Craig Paddock's father was a notorious bank robber who tried to run down an FBI agent with his vehicle in Las Vegas in 1960 and was on the agency's most wanted list after escaping from a federal prison in Texas in 1968.
Authorities initially believed Marilou Danley was traveling with Paddock at the time of the attack, but have since confirmed she's been traveling overseas since September 25 and was in the Philippines at the time of the attack, NBC reported. That impression was aided by the fact that Paddock also owned properties in California, Florida, and Texas.
The FAA website shows that the last time he went to get the medical certification required for private pilots who want to fly was February 2008 so he could not have flown legally recently.
Paddock was a retired accountant and didn't have a criminal record.