So facing your accuser is not a thing anymore?
Happens all the time, FAANG firms are constantly getting in trouble for it.
One difference between a courtroom and a workroom, is that a boss can often ruin his accuser's life in the latter. The justice system works because it treats all people as equal. In the workplace, you are not the equal of your manager.
Fortunately, you can always escalate your complaint into a courtroom. Unfortunately, proving retaliation is next to impossible.