Not guilty does not mean we know you are innocent. Not guilty means the prosecution has not proven guilt beyond reasonable doubt.

There have been trials where jury members have stated after the case that they believe a defendant committed the crime they were accused of, but the prosecution did not do a good enough job of overcoming the definition of reasonable doubt. Therefore they had to find not guilty (Tobias is right...they do not say you are innocent).

There have also been cases where a defendant was found guilty, but the verdict was overturned on appeal because of mishandling or misrepresentation of evidence during the case. This can happen on a judge’s ruling and have nothing to do with a jury hearing the facts of a case. In neither one of these instances is the defendant innocent. But because of legal definitions they cannot be found guilty.

This also goes into why we have civil and criminal courts in our system. Civil courts do not have the same stringent requirements as criminal courts do. This is why a certain white bronco driving ex-NFL player was found not guilty in a legal trial, but in a civil trial was forced to pay millions in compensatory and punitive damages to the suvivors of two murder victims.