Washington (CNN) Felix Sater -- the Trump Organization contact who pushed for a Moscow development project and Mueller investigation witness -- was a decade ago a federal government informant to "a depth and breadth rarely seen" against Russian and American mobsters, fraudsters, cyber-criminals and even Osama bin Laden, according to newly unsealed court filings on Friday.

"For approximately 10 years, Sater continuously worked with prosecutors and law enforcement agents to provide information crucial to the conviction of over 20 different individuals, including those responsible for committing massive financial fraud, members of La Cosa Nostra organized crime families and international cyber-criminals," prosecutors wrote to a federal judge 10 years ago. "Additionally, Sater provided the United States intelligence community with highly sensitive information in an effort to help the government combat terrorists and rogue states."

Sater led federal investigators to information about missile and precious metals trafficking as well as New York City's Genovese and other crime families and those involved in so-called "Pump and Dump" and "Boiler Room" 1990s-era trading schemes.

He also gave US government officials what they "believed to be bin Laden's satellite telephone numbers and information about who was supplying arms to bin Laden," the prosecutors wrote at the time, about two years before the terrorist leader was killed in a US military raid.

The filings, from before Sater's sentencing in 2009, describe in detail the extensive help he had given federal investigators in intelligence and law enforcement matters. He pleaded guilty to racketeering in the case that established his cooperation in 1998, and was fined $25,000 as his sentence.

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