If an investigation is ongoing those involved should HEAVILY, HEAVILY, HEAVILY stress that they do not know whether the accused is guilty or not, they are gathering information anyone who can help should please do so.
That way on the one hand people know to be wary of the person but OTOH peoples life aren’t being destroyed over allegations. It also avoids t creating a heavy prejudice either way before the investigation even starts.
(I heard from a lawyer involved in prosecuting these type of things that he tries very hard to get the media and social media involved in these cases because he knows that once they do the defendant has a zero percent chance of acquittal.)