You should not find it significant at all that his defense attorney feels confident that he will be found not guilty. It's literally his job to say things like that. The guy could be guilty as sin and his defense attorney will (and should) go out there and say that he believes he will be found not guilty. Don't be so gullible.

*note I'm not saying he is or isn't guilty just commenting on taking anything an attorney with interest in the case says at face value.