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.
and we gave him our permission. 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. they readied the nursery and decided to name him conner. laci was nearly 8 months pregnant by christmas, the last christmas before little conner was due. you were supposed to have