he told the court he couldn't have killed bob poynter for one simple reason.committing a murder, he's milking a cow. >> he's milking oreo the cow. >> reporter: it took less than two hours for the jury to meet a verdict of guilty. he is sentenced to 99 years in prison. we couldn't find a full-length photo of garza but he looks as good in orange as you'd expect. the prosecution then settled on its second defendant in this case, chacey poynter. she had led police to garza and said she never wanted to kill her husband. chacey insisted she tried to prevent that. >> i yelled stop. oh my god. he shot him. i told him to stop. >> reporter: prosecutors didn't buy it. they raised the charge from conspiracy to murder. because, once again, chacey's a verbal account was portrayed betrayed by her digital one. >> reporter: coming up -- >> a lot of it was for sex. >> reporter: more man in chases life? secrets. >> she was looking for someone to do her dirty work. >> absolutely. >> reporter: who would the jury believe? >> my heart dropped, i was putrefied. wind "dateline" contin