tattoo of a dagger on it, and i was, two, three seconds, i was speechless, because what's going through my mind now is, this is the guy that everybody's been talking about. >> interestingly, castillon's stepfather was a texas police officer. castillon's only previous brush with the law was a misdemeanor conviction, for which he served no time in jail. when questioned, castillon denied any involvement in the murders. employment and motor vehicle records showed castillon had recently moved to texas from colorado and bought a set of commander brand snow tires when he was there. these were similar to the impressions found at the crime scene. >> we saw a lot of uniformity between the tire impressions of the defendant's vehicle to the actual casts that we had taken