of life in rick are no investigation. . it was a mystifying discovery that would turn out to be crucial. >> why is this with all these personal effects of aaron harper? >> did it make sense, does it? >> made zero sense. coming -- up an unlikely car, a cadillac, leads to an unlikely clue. when dateline continues. unlikely clue. unlikely clue. when and boat...rv...life... ...home and more. you could save up to forty-five percent. (man) that's a whole lot of discounts. ngs, and you could save a whole lot of something with farmers policy perks. (kid) sup, dad! (burke) seventeen-car garage you got there? ♪we are farmers♪ ♪bum-pa-dum, bum-bum-bum-bum♪