If a person is found not guilty, they are not guilty. To argue otherwise is to undermine the core institution of western civilization.
Seriously, this is why OJ was found liable for the murder of his wife in a civil case, as they're judged on the balance of probabilities.
And it's why people who have served time, then had a retrial ordered and then found not guilty, can be denied compensation, because decisions on compensation are also done on the balance of probabilities.
So yeah, "not guilty" != "innocent".
Court of law with its ability imprison people must have higher standard for the "guilty" decision. That makes it possible for rich guilty people to not be judged guilty.
You are allowed and expexted to use own brain. You can consider people guilty.