The father of the suspect behind Sunday night's massacre in Las Vegas was on the FBI's 10 most-wanted fugitives list in 1968 after escaping from a Texas prison that same year.

Benjamin Paddock had been sentenced to 20 years in the Federal Correction Facility in La Tuna, Texas, about 20 miles north of El Paso, after robbing Valley National Bank in Phoenix in 1960, according to a 1971 story in the now-shuttered Tuscon (Ariz.) Daily Citizen.

His son, 64-year-old Stephen Paddock, killed himself Monday as police broke into his room at the Mandalay Bay hotel and casino.

Benjamin Paddock, born in Sheboygan, Wis., went by multiple aliases, such as Perry Archer, Benjamin J. Butler, and Leo Genstein, among others. He also called himself "Big Daddy," the article reports.

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Benjamin Paddock had seemed to be starting his life over in Tucson before he was arrested for bank robbery. He served two prison terms in Illinois and operated garbage disposal and dishwasher business called Arizona Disposer Co.

Stephen Paddock would have been around 6 or 7 years old when he lived in Tucson, though it's not clear for how long. The family lived in a neighborhood about 5 miles from central Tucson on the west end of Interstate 10.

While living in Tucson, Benjamin Paddock volunteered with the Pima County juvenile probation department, according to news stories. He was named a special deputy in 1959, assigned to handle cases of wayward youths, according to newspaper articles.

But in 1960, Paddock was accused of robbing a bank in east Phoenix. Police were also attempting to tie the man to four other bank heists in the metro area dating back to 1958.

The manager of Valley National Bank robbed in 1960 followed the getaway vehicle and saw a man later later identified as Benjamin Paddock get into a 1960 Pontiac with distinctive aerials. Authorities determined a ham radio operator owned the car and cross checked holders of such licenses for their autos.

Police narrowed suspects down to two men who owned brand-new Pontiacs. Bank employees identified Benjamin Paddock as the culprit, according to the news clippings.

Only weeks had passed since the robbery, but by that time Benjamin Paddock had moved to Las Vegas. FBI agents tracked him down there and attempted to arrest him at a gas station.

He attempted to run over one officer with his vehicle in Las Vegas when they arrested him for the Phoenix robbery, police said. Another agent fired a bullet through his windshield and Paddock surrendered.

In 1961, he was sentenced to 20 years in federal prison. Two prior accusations of bank robberies surrounded Benjamin Paddock but were dropped in court.

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On Dec. 31, 1968, he escaped from the federal prison in La Tuna.

At the time of his escape, authorities said Benjamin Paddock was a diagnosed psychopath and therefore "extremely dangerous." The FBI reported he had suicidal tendencies.

The FBI also called him an avid bridge player. His son was a retired accountant with a taste for high-stakes poker who had moved to Nevada in 2015.

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One officer in charge of the FBI Phoenix office said Benjamin Paddock was "a glib, smooth-talking man who is egotistical and arrogant," the Daily Citizen reported.

The 6-foot-4, 240-pound Benjamin Paddock had earned the nickname "Chrome Dome" because of his habit of shaving his balding head.

Ten years later, police located Benjamin Paddock in Oregon, according to a 1978 report in the Arizona Republic. He had been living under the name Bruce Warner Erickson and operated a bingo parlor in Springfield, Ore., which he received a license to open. The authorities' background check and the state's attorney office failed to uncover Benjamin Paddock's true identity, so he was able to open the bingo parlor without being detected.

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It was opened as part of the nonprofit organization Center for Educational Reform in Eugene, Ore. The elder Paddock even received two traffic tickets while under the false identity in Oregon.

FBI agents were alerted to Paddock's whereabouts in Oregon after he was featured in a Springfield newspaper story along with his photo. He had been removed from the FBI Most Wanted List the year before, “when it was felt he no longer fit the Top 10 criteria,” according to FBI archives.

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Eric Paddock, Stephen Paddock's brother, said the family was estranged from Benjamin Paddock after Eric's birth, and Benjamin Paddock is now dead.

Social Security death records show that Benjamin Paddock died Jan. 18, 1998, in Tarrant County, Texas. The Federal Bureau of Prisons operates a facility in Fort Worth, the county's largest city.

Sunday night's Las Vegas shooting left at least 59 people dead and injured more than 500 as alleged shooter Stephen Paddock fired down on concertgoers from a hotel room above the Las Vegas strip.

Contributing: Richard Ruelas, The Arizona Republic; James B. Nelson and Meg Jones, Milwaukee Journal Sentinel; and Aaron Martinez, El Paso Times. Follow Tess Sheets on Twitter: @sheets_tess