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
a few times. it had today have been from some of that. there is no other explanation. that is factual. there was no altercation. no, ma am. no, ma am. look at her fingernails if you think there is something in her nails missing off my face. it didn t happen. there was no altercation. write it down. none. reporter: for now, it seemed that was all the agents could do. document fred s story and let him leave. i m sorry to be crude. time is 11:23. i m turning off the recorder. reporter: investigators have their theories but did they have a case? fred went home to texas where his family thought that would be the end of it. his entire philosophy through all of this was it was an accident. i m telling the truth. he wanted to help them see that. reporter: but investigators hadn t seen that. not at all. if fred couldn t answer their questions. they would head back to
it s seeing that that was all the agents could do for now. document fred story and let him leave. i m sorry to be accrued open book. i am turning on to report this. investigators had their theories, but they have a case? fred went home to texas where his family thought that would be the end of it. his entire philosophy through all of this was, it was an accident i m telling the truth. he wanted to cook operate. but investigators had not seen that. not at all. and if fred couldn t answer the questions, they headed back to cottonwood creek and hope that the water could. coming up, fred has always said that water carried leslie away, to here where her body was found. now, investigators put that story to the test. we had to go back and try to duplicate the water flow as it was on the evening of the event. they said it was no way that
you would know that. what are you trying to tell me? that we made love that morning. reporter: but even as the seemingly confident fred grew clearly irritated, the agent wasn t deterred. what about those scratches on his face the day leslie died? so these vertical scratches, you re saying you got from bushes? bushes or that ground or running down this hill. falling a few times, which i did fall, but it had to have been from some of that. there s no other explanation. okay, well then that s factual. there was no altercation up there? no, ma am. no, ma am. cause it looks check underneath her fingernails if you think there s something under her nails that s missing off my face. it didn t happen. there was no altercation. write it down. none. reporter: for now it seemed that was all the agents could do. document fred s story and let him leave. i m sorry to be a crude open book. time is 11:23. i am turning off the recording.