Jorge Juertes lived next door to Paddock's mother when she resided in Dallas, Texas, and said he met the man once.
Speaking about Paddock, he said the man used to visit his mother occasionally but never interacted with the other residents.
In an interview with the Fort Worth Star-Telegram, Juertes said: 'He wasn't very sociable. She [his mother] said he's a bad boy.'
Another neighbor, Maria Alameida, recalled that he bought the house for his mother in 2004 before brother Eric moved her to Florida some time later.
The Star-Telegram reports that Paddock himself worked in Texas until some time in 2010, and owned a pilot's licence while there.
He rented a hangar at the local airport and kept a plane there, paying his rent on time. His flying permit shows he wore glasses for short-sightedness.
He also obtained an Alaska hunting and fishing license while living in Texas.
At the time of the massacre, Paddock was living in Mesquite, Nevada, a short distance from Las Vegas.
He had bought a $369,000 home in a retirement community with the proceeds of a real estate business worth around $2million.
In the days before his attack he was holed up in a suite at the Mandalay Bay hotel, located on The Strip.
He used 10 suitcases to transport 23 weapons to the room including multiple rifles, two of which were adapted to allow them to essentially fire on full automatic mode.
After setting up the weapons, including two mounted with scopes and on tripods, he smashed the windows of his suite with a hammer, then opened fire on the Route 91 Harvest Festival below.
In total 59 were killed and more than 500 injured, making it the worst mass shooting in American history.
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