Actually, we talk about what is and isn't a crime all the time. That's how the laws are made in the first place. ;-) We also say that people are alleged to have committed a crime. When you charge someone with a crime, you don't necessarily have definitive proof that they committed a crime. That's potentially established in a court of law.

Finally, all of that is applicable to the courts & government determining criminal acts. The courts don't determine what is moral or ethical. Lots of things are wrong that aren't criminal. Saying something particular behaviour wrong really doesn't have anything to do "innocent until proven guilty".

Saying that, "if someone did what the story said they did, it's wrong" is really not saying anyone is guilty of anything.

Trying to think of how to summarize this better. We can have right and wrong without having any guilty parties. Saying that murder isn't a crime isn't the same as saying that anyone was murdered or that a particular person committed the crime.