Former pro golfer and restaurateur David Correia made efforts to further the business interests of two indicted associates of Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE, CNN reported Monday.

Correia was arrested in October, days after Giuliani associates Lev Parnas and Igor Fruman were taken into custody. The former golfer reportedly worked with them while they attempted to collect documents that they said showed corruption by former Vice President Joe Biden Joe BidenBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Joe Biden should enact critical government reforms if he wins MORE, according to sources and text messages obtained by CNN.

The former golfer, who pleaded not guilty to allegations that he used foreign money to get political support for a marijuana business in the U.S., attempted to sell U.S. liquified natural gas to Ukraine through a pipeline in Poland.

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Correia’s work focused on drafting business contracts in Ukraine and memorandums of understanding to present to other potential partners, four sources who deal with the three men told CNN.

The former golfer was reportedly seen as a contrast to Parnas and Fruman because he was considered to be conscientious and smooth and was the one who executed the business deals.

"Lev was flamboyant; he only got out of bed at 2 p.m. in the afternoon," a source who talked business regularly with the three men told CNN. "Correia was the worker, the one really trying to make a business out of all their connections."

Correia reportedly took steps to get Giuliani to connect with the company he created with Parnas, Fraud Guarantee, including garnering at least $500,000 that Giuliani requested to participate.

He told two sources that getting Giuliani involved would be a “home run” for the firm, and some people who were petitioned by Correia for money have been subpoenaed by the Southern District of New York.

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The former pro golfer also utilized Giuliani’s contacts to seek potential business and attended Giuliani’s private meetings at Trump International Hotel and other Trump-related events.

CNN noted that Correia’s biggest goal appeared to be selling U.S. liquified natural gas into Ukraine and other areas of Europe by developing a relationship with Ukraine’s state-owned oil and gas company.

The three men also worked with Dmitry Firtash, a Ukrainian oligarch tied to Russian President Vladimir Putin Vladimir Vladimirovich PutinFormer GOP lawmakers on endorsing Biden: Trump is no Republican, 'lacks basic self-control' Watchdog confirms State Dept. canceled award for journalist who criticized Trump Former intelligence agency director Robert Cardillo speaks out against 'erratic' Trump MORE, and received payment for connecting him to two of Giuliani’s friends. Firtash’s lawyer denied to CNN that the oligarch worked with the three men, but two sources indicated Correia spent more than a week with Firtash.

Correia turned himself in at JFK International Airport in New York after Parnas and Fruman were arrested.

President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE and Giuliani’s relationship with Ukraine faced scrutiny while the impeachment inquiry in the House unfolded. A whistleblower report detailing the president’s request that the Ukrainian president investigate Biden sparked the House’s eventual impeachment of the president.