Anyone who gets to the point of a criminal trial has been credibly accused. If the accusations weren't credible, the prosecutor would not bring the case. The standard for a criminal conviction is "beyond a reasonable doubt" which is a higher bar than "credibly accused" (and rightly so).

"Not Guilty" does not imply "Innocent"

Yes, the world is black and white. Definitely no grey areas in the legal system. Certainly no guilty people get off on technicalities.