That was not something she came out and said directly. She was coerced and this was suggested. Her "accusation" was more of a "sure he could have done it" than a "I am innocent, THAT guy is the guy you are looking for!!!!"
Upholding the ruling, and saying that the punishment conveniently matched the time served, is too much to just blink twice at and call a day.
So, whatever. The whole point of a slander charge is not to silence the people, but to make it so that people do not HURT others by unfounded accusations.
When her parents cry "foul" against the judge that DID screw things up, then it is a far cry from slander.
If they called him an ugly moron that does not deserve to breathe, let alone wear the [insert item of Italian Justice wardrobe here], then that would be more along the line of baseless insulting in order to hurt/damage.
The whole thing was a crock, and somehow accusing those that said it was so early on of "slander" as a double joke.