jim fisher says the fbi and the u.s.ney took the easy way out and never really solved the case. >> bill rothstein died about a year after the crime, and he died with, in my opinion, all the secrets, all the answers. and to that extent, well, nobody literally dies laughing. he went to his grave knowing that he had outfoxed everyone. >> neither the u.s. attorney's office nor the fbi would comment to cnn about fisher's assertions. and yet, there is someone who is alive, who kenneth barnes says was at rothstein's house the day of the robbery but was never charged in the crime. he is the convicted sex offender granted immunity in exchange for testimony he was never asked to give. next, brian well's family is really wanting to know about you, sir. please. could this man hold the answers that would finally solve the case? consider the silverado 1500 -- still the most dependable, longest-lasting full-size pickups on the road. and now we've also been recognized for lowest total cost of ownership -- based on important things, like