It was on a documentary within the last year aired on Court TV. He didn't demonstrate it over and over. He just did it once as he was talking about his investigation. At the time, he made a comment about detectives thinking it was too small, then he just did it. I need to see if I can find the documentary. It was very interesting!
I meant that Smit's demo has been shown over and over, in different TV presentations.
It's hard for me to imagine a current investigator like Bennett doing anything like that in the media, but I've pretty much ignored the case for more than 3 years, so maybe things have changed a lot in Boulder.