details. that was the worst day of my life that i found out about my mom. a loving couple. a romantic hike. a secluded spot. she was turning to look at the bird. it s like her feet just went out from under her. all of a sudden i hear yelling coming from downstream. there was mrs. muller floating face up. a wife falling to her death. her husband falling apart. he was panicking and shaking. crying. the evidence at the scene makes you believe something entirely different happened. he told me she fell 20 feet. where were the injuries? why did i not see what i expected to see? a search for truth in the woods and water. if your theory is right, it is. loo like she was being hunted. almost like a hare and a wolf. two chilling accounts of what happened to the mom they adored. one seemingly unsolve able mystery. you either believe crazy story a or crazy story b. both stories are crazy. which one do you want to go with? winding down a mountain in southwest col
reporter: but were these tests enough to make a full- fledged criminal case? the first person they would have to convince was the local district attorney. he was quickly brought on board as to what we were investigating. reporter: it turned out to be a hard sell. for whatever reason, we could never pique his interest. he never said no. but i didn t find the enthusiasm. reporter: even after those tasks, the da wasn t ready to press charges. months went by. then a year. leslie s picture was still there right behind sheriff bruce s desk. the investigators were not about to shelve their case. were the wheeling turning? there were things yet to be done. but the months did run on. reporter: all this time, fred was a free man in texas. his business ventures were moving on. at home, we were all saying fred mueller believes he got away with murder.