question. everybody has their answer to that. in my heart, i say no. in my head, i have a few questions. >> to answer those questions, sandy contacted multimillionaire brian pardo. he supports the death penalty but funds investigations for inmates he thinks are innocent. >> i felt that it was extremely important to exclude darren and the only way he was going to be eliminated as a suspect was to pass a polygraph. that's what the police like to do. >> can you name the person that stabbed your son? >> no. >> the results of pardo's investigation were about to uncover dark secrets that darren had kept hidden for years.