guilty
Innocent or Not Guilty
A person is never found innocent. A person is found guilty or not guilty at the verdict phase of a criminal trial.
Guilty, was fined $100.
acquitted or found innocent
Assuming you're asking about Chase's impeachment trial in the Senate, he was found not guilty (no one is ever found innocent) of the charges against him in 1805.
In a civilised country the basic rule of law is that "one is presumed to be innocent - until found guilty." One is not "found" innocent therefore.
The opposite of innocent is guilty.
The correct spelling is innocent. The jury found him innocent of all charges. Many innocent persons are also charged, found guilty, and jailed.
The antonym of innocent is guilty.
The word "innocent" means the same as "not guilty". But nowhere apart from Scotland is anyone "found innocent". That is because in all common law systems, accused persons are presumed innocent unless proven to be guilty. If there is not enough proof that the person is guilty, he is found to be "not guilty" even though there is no proof of his innocence. The OJ Simpson case is a case in point. One court found that there was more evidence of his guilt than there was of his innocence, but another court found that there was not enough evidence of his guilt to find that he was proven guilty of the crime. He was therefore found not guilty although no court would find him innocent.
In court trials, the two outcomes are either "guilty" or "not guilty". Therefore, any one who is not found to be guilty is declared to be not guilty and will be free to leave the court. There is not verdict of "innocent" in virtually any court in the world.
People are never found innocent, they are found not guilty, and they have a right to know that they can never be tried for that exact crime again.