Many, many defense attorneys know their clients are guilty. Like I tried to say...they are not defending the actual person, they are defending the system that would run over you and I in an instant if allowed to. It may be painful to hear, but better a guilty person go free than an innocent be convicted. It is a tight rope...but if the state doesn't have all its ducks in a row, if they try to circumvent the evidentiary rules, it is the defense attorneys duty to bring that up. If bringing that up ends up in an acquital...oh well. The state has the burden of proof to prove BEYOND A REASONABLE DOUBT the guilt of a person. If they can not do that...the person must go free. You would not want it any other way, believe me.