some ordinary smoker may have left it there, but not christy fleming. they sent those butts to the sheriff's department crime lab, ordered the most sophisticated test available, and waited. and this time the result was perfectly clear. >> it positively identified art future ayers as the suspect. >> without any doubt. >> without any doubt. >> and, again, it comes back to her habits and customs. when art was talked to originally, he said he hadn't been there for two to three months. now, maybeat my house cigarette butts would be in the trash can for two or three months, but not christy. those were there that night. >> but there was still one little problem with this case. cigarette butts only placed art gutierrez at the crime scene. they didn't prove beyond a reasonable doubt that he actually killed christy fleming. the d.a. and the detective needed something else to hang the murder on him. short of a confession, was there any way to get gutierrez to incriminate himself without him knowing about it? oh, yes, there was. but it would require an inventive st