Then you lack a moral compass and need t get some help. I'm suggesting that when you know the fucker is guilty, you put his ass in jail, not defend him.
If your defense lawyer won't offer competent counsel it won't ever be a fair trial. Everybody speculates, even defense lawyers. The prosecutor, the judge, the jury members, the journalists, everyone on the peanut gallery got a personal opinion. You can pick one from the lynch mob as judge, jury and executioner and you got the court of personal opinion instead of the court of public opinion, it's still a shitty system.
That's why we have a system built on evidence. The prosecutor lays out the evidence in favor, the defense lawyer the evidence against, the judge is the referee and the jury decides if it's proven beyond a reasonable doubt. Now certainly there's a lot of subjective evaluation on what testimony is credible, evidence is reliable, theories are plausible and so on.
It's not supposed to be gut feel speculation based on superficial appearance and behavior, maybe you get an impression he's creepy and sleazy "hood rat" but that doesn't make him more guilty.than a slick smooth talker in a suit. At least it's not supposed to, but that's what personal opinion often is - how well the person in front of us matches the mental image we have of "that kind" of person.