Lev Parnas, an indicted Ukrainian-American businessman who has ties to President Donald Trump's personal lawyer, Rudy Giuliani, is now prepared to comply with requests for records and testimony from congressional impeachment investigators, his lawyer told Reuters on Monday.

Parnas, who helped Giuliani look for dirt on Trump's political rival, former Vice President Joe Biden, is a key figure in the impeachment inquiry that is examining whether Trump abused his office for personal political gain.

His apparent decision to now work with the congressional committees represents a change of heart. Parnas rebuffed a request from three House of Representatives committees last month to provide documents and testimony.