abandoned at birth, is determined to find his biological mom. >> so, right now, we're heading to cece moore's hi. >> come on in. >> i'm ben. >> hi, it's very nice to meet you. >> likewise. >> come on in. >> okay. >> i have some news, things to show you. >> reporter: cece has taken ben's dna and entered it into four national databases, hoping for a match to his biological mother. with possible hits on distant relatives, the dna detective's got her work cut out for her. but then, she catches a break. a direct hit on someone they weren't even looking for. >> i logged into your match list a couple of days ago, and i saw this. r.b. is your father. >> reporter: ben does an actual double-take. >> i had the same reaction. >> how did the planets align perfectly for that to happen? >> it's a man named richard blanshfield, who's a pretty incredible guy. he's a vietnam vet and he's not just any vietnam vet, he's a highly decorated vietnam vet. >> reporter: what are the odds? ben, a veteran of two tours in iraq, learning his biological father is a war hero. >> his arm was nearly blown off at the shoulder.