I could never be a criminal defense lawyer or a criminal appeals lawyer unless I could make a decent living representing those that *I* was either convinced of being innocent or at least strongly suspected that they were innocent.
I can't,for the life of me,understand how lawyers who represent the likes of OJ and Skakil can sleep at night.
Olsen probably was interested in the legal argument more than the client. It is an interesting legal question. Law & Order has done similarly themed shows, especially on catching somebody 20 years later who committed murder as a teen. Or catching somebody who said something incriminating pre miranda, and does it count. Ted Olsen just likely wanted to argue the law here with not a great shot of winning, plus he got paid well I am sure.