beverly himmic is in charge of forensic testing at the crime lab. so she went to work at it, putting the dna cells into what she calls a cocktail and then thermocycling, heating and cooling it. in the final step, the dna that had been copied was taken into a special room and placed in this machine. then holding her breath, dr. himmic watched to see what popped up on the screen. >> we immediately see the profile that's been generated and when we found dna that was able to be copied up from the crime scenes and to generate profiles, there was a lot of excitement here in the room. >> i got a message from the lab saying we need to talk to you right away. so i went down to the lab. >> and? >> they told me they matched it. >> it was a great moment. i know it was a great moment for him. it's something i know he's been waiting to hear for a long time. >> tom jenson is not an effusive kind of guy. so it's sometimes hard to know when he's having a great moment. tom, you don't seem like the kind of guy that would run around the room slapping high fives, but yo