Trump is also big scared. He's terrified that when the FBI publishes their investigative report, it will include a medical report on what caused the injury to his ear. I'd be very surprised if it doesn't because I assume a medical report is considered evidence. So, Trump is lying when he says the FBI never checked. Of course they've seen the medical report. Otherwise, why would Wray suggest in his testimony before Congress that there is some question as to what caused the injury.
As some of you may have noticed, I made this point yesterday in another post about Christopher Wray. I saw that part of his testimony and my first thought was, wait, has he seen a medical report? Then my feeling was, yes he has. Otherwise, why would he say that. It also explains why Trump posted this angry statement accusing Wray of being a liar. He's scared shitless of his lie about the injury being exposed.