Innocent in court yes, but that doesn't mean he didn't do it. The two are very different. People who are known to have committed prosecutable offenses are not prosecuted for those offenses every day, because the case is insufficient, the prosecuter had too much to lose going after them, etc. etc. Again, that doesn't mean, nor certainly prove, that they didn't commit the prosecutable offense. It just means they weren't prosecuted, or the prosecution failed, which can happen for a variety of reasons.
In some people's world, being convicted of a crime means the person did it; not being convicted means they didn't. My world recognizes the many factors influencing these decisions, and the fact that humans make errors. I suspect yours does as well, but that you are just not applying it to this situation, because doing so wouldn't suit your purpose.