reporter: but days and weeks and months went by, and nothing happened. and over time the fear eroded. but the investigation went nowhere. did you ever get to the place where you thought, we ll just have to live with this uncertainty for the rest of our lives? i would say four years into it, it s like didn t make any difference. reporter: yeah, not gonna bring him back. it is not gonna bring trent back. but still it s why did this happen? you re four years in, five years in, and really no closer to solving it. reporter: your first case and it day one. that will make you doubt yourself. reporter: and then one day a particular woman happened to see an anniversary story about the unsolved murder of the football player back in kentucky. a woman who d once sat in a bar in a fog of love. and who now was quite terrified. a break in the case from out