. >> reporter: prosecutors mark digiacomo and pam weckerly told the jury that while noel "greyhound" stevens was the admitted killer of shauna tiaffay, he never would've done it had george not put him up to it. >> he's got this singular goal of, i need to kill my wife. and he has to keep pushing noel to do it. >> reporter: shauna's sister paula testified that she encouraged her sister to move out. >> i told her that based on the things she was telling me about that had been going on for quite a while, that i believed that she should separate herself from george and move to a different home. >> reporter: so she did and george increased his contact with noel. his phone calls to stevens in the month before the murder proved a conspiracy, said the prosecutors. they showed the jury george's phone records. >> if you looked at how much he called noel, there's 87 phone calls. >> that's three or four calls a day. >> yes. his mother is about once a day. >> reporter: then, they said, look at this. here are george and noel shopping together. buying gloves, dark clothing, a knife. and on four dif