but to this veteran cop, david s emotions seemed real. and in the end, edmunds had no reason to believe that david played any role in a plot to kill kay. we had no evidence whatsoever to prove that he knew or was involved in any of this. i really don t wanna come have to come back, you know? come back to you with somethin else that comes out that you haven t told me. you know what i m saying? oh, well, you can ask me anything. i don t know what else you need to hear from me. i m not tryin to keep anything from you guys. i promise. reporter: before edmunds turned off his recorder, david did share one tidbit. something that linked up with what becky s brother had told edmunds earlier. it was the name of the other person becky had confided in about her affair with david. becky s son, chris. i asked her who knew. you know, who else knew. and she did tell me that christopher knew that she was with somebody else. i don t know if that means anything or not. reporter: sheriff s
time edmunds heard tears coming from his interview room. but to this veteran cop, david s emotions seemed real. and in the end, edmunds had no reason to believe that david played any role in a plot to kill kay. we had no evidence whatsoever to prove that he knew or was involved in any of this. i really don t wanna come have to come back, you know? come back to you with somethin else that comes out that you haven t told me. you know what i m saying? oh, well, you can ask me anything. i don t know what else you need to hear from me. i m not tryin to keep anything from you guys. i promise. reporter: before edmunds turned off his recorder, david did share one tidbit. something that linked up with what becky s brother had told edmunds earlier. it was the name of the other person becky had confided in about her affair with david. becky s son, chris. i asked her who knew. you know, who else knew. and she did tell me that christopher knew that she was with somebody else.
to prove that he knew or was involved in any of this. i really don t wanna come have to come back, you know? come back to you with somethin else that comes out that you haven t told me. you know what i m saying? oh, well, you can ask me anything. i don t know what else you need to hear from me. i m not tryin to keep anything from you guys. i promise. reporter: before edmunds turned off his recorder, david did share one tidbit. something that linked up with what becky s brother had told edmunds earlier. it was the name of the other person becky had confided in about her affair with david. becky s son, chris. i asked her who knew. you know, who else knew. and she did tell me that christopher knew that she was with somebody else. i don t know if that means anything or not. reporter: sheriff s deputies spent a lot of their investigation looking at the relationships in becky s life. first her son michael. then david. but it was becky s relationship to her other son chris that