and trish hughes's drowning. tors called everyone with links to castro, the phone trail took goodwyn to south texas. >> it took us to south texas because patricia hughes the victim in the drowning was from beeville, texas. >> reporter: goodwyn questioned trish's family and a sister recalled trish had gone with a guy way back when. >> a guy by the name of daniel perez. >> reporter: had you ever heard that name in all your years of trying to figure out who lou castro was? >> no, i'd never heard that name. >> reporter: daniel perez. goodwyn immediately contacted the local authorities and it turned out there was a record of a daniel perez and a mug shot. >> they faxed that to me that day. >> i remember when ron finally got the fax from texas and i snatch it outta of his hands and said, "where did you get that?" it was obvious that it was, you know, the person we knew as lou castro. but now we, of course, knew he was daniel perez. >> reporter: we got our guy here? >> yes. >> reporter: lou castro was daniel perez born i