That isn't what she said. Technically an acquittal doesn't mean you are innocent, you can get an acquittal because of a lack of evidence.
Also innocent until proven guilty is a legal concept. If Carl the Llama stabs someone 37 times and kills a person, Carl is guilty of the crime, he bloody well did it. However he isn't considered guilty by the state unless they prove it in the court of law and thus the state should treat him as innocent. Even though he bloody well isn't. I mean fuck, he even cut off the dudes hands and at them. I mean there is video of him at the crime scene and even admitting it. However if the evidence was gathered in an illegal way for example he could be found innocent... even though he isn't. Granted it works both ways, guilty people are found innocent and innocent people are found guilty.