What does it matter? Who he was, is meaningless. He is a case number, now. Playing silly games with names is not going to put him on the street.
So, if I commit a Felony - does everyone have the right to commit crimes against the public, yet remain anonymous? I didn’t find that “right” anywhere in the Constitution. Part of the penalty of being charged with a crime, is the public being aware that “Johnny” is suspected of doing something.
It seems this man felt entitled to defraud the public out of millions, and now is entitled to remain anonymous too. I don’t think he is entitled to any more, or less, anonomity than any other person.
Accurate identity(ies) may prove useful to recover some of the missing funds.