No, your question was, "What reason is there to think that any particular defendant was guilty as charged?" Guilt is determined by law.
The dictionary gives your definition as secondary to mine:
guilt·y adj.
1. Responsible for or chargeable with a reprehensible act; deserving of blame; culpable: guilty of cheating; the guilty party.
2. Law. Adjudged to have committed a crime.
Now, was there reason to believe they did the crime? Personally, I don't know. But those closest to the case[...] decided unanimously that they were guilty.
Your previous reference to the OJ jury comes to mind here.
Times 8? Are you sure you don't want to investigate the jurors after all?