>> reporter: there was a big wedding in the summer of '97. and by the turn of the millenium scott was a fertilizer salesman in modesto. laci a substitute teacher. his job took him on the road a lot, but they were happy. did the three of you get to know the two of 'em together much before -- >> uh-huh. i thought he was a great guy. >> we thought they were great together. >> she was always happy. it was almost a joke of, "gosh, does he have a brother?" >> reporter: though laci struggled to get pregnant, after nearly five years of marriage that came too. >> the day after my baby shower that she threw for me, she took a pregnancy test and called everybody very early. >> very early the next morning. >> reporter: soon enough the petersons learned they were having a boy.