Lawyers are bound by their oath as an advocate for their client to represent them to the full extent of the LAW of the state they practice in. However, they are not supposed to break the law, conceal evidence, or knowingly commit acts that could convict their client. All people accused of a crime, no matter how heinous, are still innocent until PROVEN guilty by the district attorney.
That is why some of the best mayors(like Rudy)start out as district attorneys. Defense attorneys, many times, compromise themselves in the pursuit of getting their client off. It becomes all about the money they can make defending guilty criminals.
If you remember during the OJ trial, Robert Shapiro took a back seat in the defense to F. Lee Bailey, Johnny Cochran and others. The rumor was that Shapiro originally thought OJ was not guilty. He discovered eventually that he was guilty as sin and no longer wanted to defend him. He actually had scruples. So, he just sat there for the rest of the trial and kept his mouth shut but did not aid in his defense. The other rumor was Kardashian(his personal attorney)picked up OJ from the airport after returning form Chicago. It was rumored that the knife was in OJ’s golf bag and Kardashian disposed of the murder weapon.
Although the prosecution is supposed to represent justice and only bring a true case, there are too many prosecutors bringing forth unreliable testimony and evidence for the sake of their win-loss record and their careers.