And then, even more surprised -- even to this day, i find it hard to believe. worried about your arrest, traveled fast -- home. >> -- >> it sounds terrible, but thrilling. -- and you -- stay in prison for the rest of his life and never get out. >> the trial finally began in 2007, 23 years after robin's murder. william marshall is now 46. he arrived in court each day, carrying a bible. he's troubled youth, early drug addiction, brief rap sheet for decades behind him. this was a man he -- capable -- and just watched john lewin with the case against him. william marshall knew before he walked int...