https://www.dailykos.com/stories/2018/4/24/1759522/-New-filing-from-Robert-Mueller-shows-raid-on-Paul-Manafort-was-partially-about-Trump-Tower-meeting
"The mention of the Trump Tower meeting is particularly interesting. Recent court documents concerning Manafort, Gates and convicted Dutch attorney Alex van Der Swaan have indicated that Manafort was regularly communicating with at least one Russian operative during the time he was working for the Trump campaign. Based on this latest filing, it appears Mueller also suspected that Manafort might have done more at that Trump Tower meeting than just “play with his phone.” Testimony of those present at the Trump Tower meeting—including Manafort, Jared Kushner and Donald Trump Jr.—has changed almost every time the afternoon meeting is discussed."