here. >> today, forensic analysts have access to sophisticated databases of all kinds of shoe impressions. it includes men's, women's, even children's shoes, both dress and leisure from all over the world. this database is called sole mate. >> elements of the shoe patterns will be entered in by the operator. so, if it has squares in the ball area of the shoe or the toe area of the shoe, you would enter that in, and then the computer comes back with a list of possible shoe treads, and you can pull those up and look at them to determine, you know, if any of those are the shoe you're actually looking for. >> checking and cross-checking finally gave investigators their first solid piece of information. >> the footwear impressions were consistent with having been made by a spalding tennis shoe. >> unfortunately, the print wasn't complete, so some details were unclear. >> the fact that he's wearing