* "Un-" is the most common and straightforward option: "uninnocent" (though it sounds a bit awkward). This implies a lack of innocence.
* "Non-" works similarly: "non-innocent". It emphasizes the absence of innocence.
* "Guilty-": This implies wrongdoing and responsibility for a crime or offense.
* "Culpable-": Similar to "guilty," this suggests blameworthiness.
* "Mal-": Can be used to imply malicious intent: "malicious".
Ultimately, the best prefix depends on the specific nuance you want to convey.