it was almost 15 years after karmen smith's murder when the call came in.there was a match. >> they have identified waseem daker's hair, him and only him, to the exclusion of all others, on the dead body of karmen smith at the time that she was found. >> you had your smoking gun? >> absolutely. >> i got a call from detective dawes. i was very happy, but it was really hard for me to have to go back and tell the story of the things that he did. >> lottie dreaded the thought of testifying in open court, in front of daker, but she knew there would be no avoiding it. daker was arrested and charged with murdering karmen smith and stabbing her son nick. his trial started in september of 2012. >> all rise. >> prosecutor jesse evans was there for the state. >> this case ladies and gentlemen is about obsession. >> evans argued that daker was a violent stalker and that his obsession with one woman led to the murder of another. >> you can't get into the mind of a psychopath and see why they chose to kill. some people are just mean. >> evans said daker had left a trail