Whoaaa now Compadre, That Cobb killing is an urban legend that I believe has been proven false by a SABRE member. As far as Lewis goes,If I remember ,he was only proven to have been at the killing, not actually committing the murder,but I could be wrong on that as I didnt really follow the case that close.
In the end, just collect,or dont collect who you want. Thats a beautiful thing.