Bill Browder testified in Congress earlier this year about Fusion GPS paying Russians for dirt on Trump.
He also explained the death of his parter Magnitsy who the Russians murdered to keep the corrption they are guilty of a secret.
The Russian Lawyer Valnetskya who met with Jr in Trump Tower was barred from the US over her constant lobbying for lifting sanctions called the Magnitsky act, named for Browders late business partner.
Full text of his testimony.
https:// www.theatlantic.com/politics/archive/2017/07/bill-browders-testimony-to-the-senate-judiciary-committee/534864/
Video:
https:// www.c-span.org/video/?431852-1/william-browder-overturning-magnitsky-act-putins-top-priority