The story as being reported I'll give links to below but it is probably much easier to understand what really seems to be happening - and why this is such a big deal - by reading a thread of Timothy Snyder's tweets here - as in Snyder's words 'it goes beyond what is being reported in the press now -
(You need to click on the blue coloured 'read the full conversation...' contained in the tweet, to see the thread in full) -
In April 2016, I broke the story of Trump and Putin, using Russian open sources. Afterwards, I heard vague intimations that something was awry in the FBI in New York, specifically counter-intelligence and cyber. We now have a suggestion as to why. 0/20
— Timothy Snyder (@TimothyDSnyder) January 25, 2023
As for what is being reported there is this from a former FBI Assistant Director who worked with McGonigal -
"This case is a stark reminder that they get up every day [in Russia] trying to hurt us, trying to penetrate our intelligence community and sometimes they get it right and they succeed, and it appears that they may have done it here..." - @FrankFigliuzzi1 w/ @NicolleDWallace pic.twitter.com/rZuA5v2tnZ
— Deadline White House (@DeadlineWH) January 23, 2023
Former top FBI official accused of taking cash from Putin ally to investigate rival
https://www.theguardian.com/us-news/2023/jan/23/fbi-charles-mcgonigal-oleg-deripaska-russia-putin
And finally...
Trump’s solution to end the war is for Ukraine to surrender. pic.twitter.com/CHaPrjUusm
— Ron Filipkowski (@RonFilipkowski) January 26, 2023