can't think of the word where: someone is actually guilty but their allowed to act like their innocent. like nothing happened

Maybe this:

http://www.google.com/search?rlz=1C1GGGE_enUS379US379&sourceid=chrome&ie=UTF-8&q=nolo+contendere

put on a poker face?

or perhaps "acting dumb."

Sra

The word you are looking for is "pretending."

When someone is actually guilty but they are allowed to act like they are innocent, it refers to a situation called "pretending." In this case, the person knows they are guilty of a specific act or wrongdoing, but they choose to act and behave as if nothing happened. They may deny any involvement or try to deceive others into thinking they are innocent.

It's important to note that this behavior can occur in various contexts, such as legal situations or interpersonal relationships. However, the term "pretending" generally captures the essence of someone acting innocent despite knowing the truth.