>> this insurance policy raised questions, even with one of darin's own family members. >> this is my nephew. i don't know if darin was involved. i know that that is a big 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 multi-millionaire brian pardo. he funds investigations for those he thinks are innocent. >> i thought this was important to exclude darin. and the only way he was going to be eliminated as a suspect was that you polygraph, what police like to do. >> the results of pardo's investigation were about to uncover dark secrets that darin had kept hidden for years. ♪ [laughs] irresistible moments deserve irresistibles treats. [meows] new from meow mix with real salmon chicken or tuna.