SEASON 4, EPISODE 404 - Charged with the emotional task of finding an infant's killer, Rush reopens a 1982 case involving a female baby who died of Sudden Infant Death Syndrome under suspicious circumstances. She starts her investigation with the only people who were with the baby on the morning of her death: the parents. First, Rush persuades the father to admit to not wanting the child, his second. Then, the mother confesses that she felt overstressed with the demands of a new baby, along with being a working mother. Their older child, who was only 6 years old at the time of his sister's death, hardly remembers what happened that night but somehow believes that he had something to do with it. Meanwhile, Ray (recurring guest star Brennan Elliott) enters Rush's life again.