Remember Cathy News Today

Somebody. and then she would call me up. and we would just, like -- calling each other, going out to eat, places like that. nothing serious at the time. >> sam definitely was trying to limit his connection with cathy, give the impression that its not that big of a deal. >> reporter: remember cathys sister tina had told detectives sam had proposed to cathy just days before she disappeared. but when police asked sam about that, he denied it. >> you didnt ask her to marry you, then? >> no. >> repor...

>> its -- its an off-and-on thing. on-and-off thing. >> okay. >> reporter: tell number one, how sam talked about his relationship with cathy. >> see, i was going out with somebody. and then she would call me up. and we would just, like -- calling each other, going out to eat, places like that. nothing serious at the time. >> sam definitely was trying to limit his connection with cathy, give the impression that its not that big of a deal. >> reporter: remember cathys sister tina had told detectiv...

Guilty people have tells, just like in a poker game? >> absolutely. they dont have that innocent mindset, and they -- they have other fears. they fear being caught. they cant get their stories straight because theres too many details. >> reporter: montgomery spent months carefully listening and re-listening, watching and re-watching, hours of sams interviews. looking for the tells. >> how long have you guys been dating? >> its -- its an off-and-on thing. on-and-off thing. >> okay. >> reporter: t...

>> how long have you guys been dating? >> its -- its an off-and-on thing. on-and-off thing. >> okay. >> reporter: tell number one, how sam talked about his relationship with cathy. >> see, i was going out with somebody. and then she would call me up. and we would just, like -- calling each other, going out to eat, places like that. nothing serious at the time. >> sam definitely was trying to limit his connection with cathy, give the impression that its not that big of a deal. >> reporter: rememb...

>> okay. >> reporter: tell number one, how sam talked about his relationship with cathy. >> see, i was going out with somebody. and then she would call me up. and we would just, like -- calling each other, going out to eat, places like that. nothing serious at the time. >> sam definitely was trying to limit his connection with cathy, give the impression that its not that big of a deal. >> reporter: remember cathys sister tina had told detectives sam had proposed to cathy just days before she dis...

On thing. on-and-off thing. >> okay. >> reporter: tell number one how sam talked about his relationship with cathy. >> see, i was going out with somebody. and then she would call me up. and we would just, like -- calling each other, going out to eat, places like that. nothing serious at the time. >> sam definitely was trying to limit his connection with cathy, give the impression that its not that big of a deal. >> reporter: remember cathys sister tina had told detectives sam had proposed to cat...

Dating? >> its -- its an off-and-on thing. on-and-off thing. >> okay. >> reporter: tell number one, how sam talked about his relationship with cathy. >> see, i was going out with somebody. and then she would call me up. and we would just, like -- calling each other, going out to eat, places like that. nothing serious at the time. >> sam definitely was trying to limit his connection with cathy, give the impression that its not that big of a deal. >> reporter: remember cathys sister tina had told ...

Relationship with cathy. >> see, i was going out with somebody. and then she would call me up. and we would just, like -- calling each other, going out to eat, places like that. nothing serious at the time. >> sam definitely was trying to limit his connection with cathy, give the impression that its not that big of a deal. >> reporter: remember cathys sister tina had told detectives sam had proposed to cathy just days before she disappeared. but when police asked sam about that, he denied it. >>...