“The agent’s resignation comes as the agency has undergone another purge of seasoned FBI agents across several states, multiple sources familiar with the departures told CNN. Some of the people who are being pushed out were confronted after the bureau conducted a review of the FBI’s internal messaging system and discovered instances when they made negative comments about President Donald Trump, according to the people familiar.
Some of those comments go as far back as a decade, the sources said.”
https://www.yahoo.com/news/articles/fbi-agent-initially-investigated-fatal-003658751.html