Page 5 - Kill Kay News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> reporter: and who was jerry jaocbs sister? well, becky sears. kay's best friend and neighbor. >> i think my jaw dropped right then. wasn't expecting that. he dropped a bombshell. >> reporter: becky's brother said he knew all about the affair between his sister and david. he told the investigator becky had once confided in him that david was trying to end it. >> she'd come and meet one day or there in the parking lot crying. and i was like, you know, "what's wrong?" and that's whenever she told me she was having the affair. >> he then goes on to say that becky was, had been pretty upset, cry...

>> reporter: but she admitted she did talk with david on the night before kay's murder. >> what'd you talk about? >> we talked about ballgames, the kids, and sex over the phone. which is somethin' that, i mean, we had never done that before, and i don't even know how it ended up that way. but -- >> but you basically had phone sex? >> i guess that's what you'd call it. >> did you ask her bluntly, "did you kill kay, or did you cause her death?" >> we did. she denied it. >> reporter: but other details came spilling out when investigators challenged her. >> you have asked people, more than one per...

All i saw was the circle. >> reporter: it didn't make sense to tamara and it didn't make sense to becky and chris's defense attorneys either. as they saw it, the state's case was riddled with reasonable doubt. >> what was the weakest part about it? >> the weakest part about it was the lack of physical evidence connecting them to the crime. >> putting them in that house. >> right. >> reporter: and they were just itching to get into the courtroom to try to tear apart the state's case. coming up -- if -- as prosecutors allege -- becky plotted to kill kay then who shot becky? >> he was the guy in ...

>> so he's lawyered up, chris. >> he's lawyered up. >> reporter: for investigator edmunds, the puzzle pieces had finally fallen into place -- becky had the motive to kill kay and chris, with his devotion to his mother and access to the murder weapon was her means >> go ahead and, uh, stand up. place your hands behind your back. you're under arrest for murder. >> chris would do anything for his mom and she knew it. >> including kill the lady next door. >> and he did. >> reporter: and the woman behind it all? they arrested her and charged her with murder as well. >> where do you take down becky?...

He says, "i believe my sister had something to do with it." >> reporter: and who was jerry jacobs' sister? well, becky sears. kay's best friend and neighbor. >> i think my jaw dropped right then. wasn't expecting that. he dropped a bombshell. >> reporter: becky's brother said he knew all about the affair between his sister and david. he told the investigator becky had once confided in him that david was trying to end it. >> she'd come and meet one day or there in the parking lot crying. and i was like, you know, "what's wrong?" and that's whenever she told me she was having the affair. >> he t...