There are increasingly strong allegations that he was forced out of the FBI because he altered Strzok's 302 form, and then deleted the previous revisions of the document to hide the evidence.
And it is interesting that Wray would have forced out McCabe, after he had already declared that he would resign himself if McCabe was forced out.
What changed I wonder?
What did Wray learn about McCabe that caused him to force McCabe out himself?
And why is the prosecution of General Flynn now seemingly falling apart?
http://thegatewaypundit.com/2018/02/report-andrew-mccabe-altered-peter-strzoks-302-notes-general-flynn-interview-destroyed-evidence/