Paddock robbed several banks in Arizona in 1960 and was convicted and sentenced to 20 years in prison, but he escaped from a Texas prison in 1969, Fox News reported, citing historical newspaper articles.
"Since he has utilised firearms in previous crimes, has employed violence in attempting to evade arrest and has been diagnosed as being psychopathic, Paddock should be considered extremely unsafe", Federal Bureau of Investigation agent Palmer Baken Jr said at the time.
Stephen's brother Bruce told NBC News that, while their father had a history of breaking the law, he knew of Stephen as being "law abiding", adding that he was "not mentally deranged" and "quite smart".
He was removed from the list when it was felt he no longer fit the "Top Ten" criteria, according to a listing on the FBI's website.More news: Seem far smarter and worldlier than you are with Google's new devices
Paddock bought the one-story, three-bedroom home about 80 miles north of Las Vegas in 2015 for about $370,000. He reportedly died in 1998. Nine years later, Patrick was caught in OR, living under yet another name.
Reached by telephone, Paddock's lawyer at the time, Jared R. Richards, said he could not comment because of client confidentiality concerns. Paddock didn't have gambling debt, per his brother.
The shooter was identified as 64-year-old Stephen Craig Paddock, who lived in Mesquite, Nevada.
Authorities chased him to there and attempted to arrest him - but he drove his vehicle into Federal Bureau of Investigation agents, and one of them fired through his windscreen but failed to stop him. He shaved his head and grew a goatee to avoid being recognized, and even changed his name to Bruce Werner Ericksen. It is perhaps the only significant clue that anything was unusual about Stephen Paddock, a man who otherwise has been largely described as normal and never likely to commit such a horrifying atrocity. The police reported that the Paddock could be at the Mandalay Bay from September 28. The police found 10 rifles in the room where the shooter was, but how and when they were delivered, is still unknown. Eric Paddock said the family became estranged from Benjamin Paddock after his birth.