So we're all liars and maybe we are, but I'll tell you what convinced me -- besides an overwhelming amount of circumstantial evidence equivalent to the O.J. trial -- that Strzok was not just your garden variety prevaricator but an out-and-out conniving, evil S. O. B.: his smirk.
The shrinks call that "inappropriate affect" and it sure was. What the hell was this guy smirking about? Even in the remote possibility (oh, how remote) that his bias had no direct political and investigatory consequence, he had shamed himself, his family, and the FBI and its personnel tremendously, damaging the organization materially for years to come. And yet he was smirking.
In fact, he wasn't just smirking. He was fighting back as if he were the wounded party. One "useful idiot" on the Democratic side even said he deserved the Purple Heart.