He cant be found innocent of something he hasn't been charged with.
He is, there fore, innocent.
If a shop keeper accuses you of stealing sweets but there is no evidence or charges, you're innocent.
No, hes not therefore innocent, hes not been charged, there is a difference.
Your 1st 2 sentences contradict one another.
Do you think that if someone does something, is 100% guilty, but does not have enough incriminating evidence against them to charge, they are automatically innocent?
He is neither guilty nor innocent as no charges were brought.
Whether he commited a crime, we do not know. But in the eyes of the law, he is free as the case against him was dropped.
It's messy, but
@Connor is right