"Now,"...which is obviously after Comey's firing. He could only speak of what he knew at the time he was director... which as I stated, is earlier that "now."
Do you have any reason to believe that Trump is under criminal investigation other than wishful thinking?
If he is, and if he deserves to be, then so be it. But I haven't seen any reasons that would lead me to believe that he is under investigation "now".