for chris mel mucher having him arrested. for the confidential details in the letter -- >> this is small town texas. there's any number of places that information could have come from. >> what about the lab report showing the gun matching the shell casings found at the scene? >> we had our expert who said it's inconclusive. there's no way you could say for sure. >> police, they said, should never have taken their sights off the real shooter. >> they had the right guy. >> dylan spellman. you think that's the killer? >> he's a better match than my boy. >> he had failed a polygraph exam and started to plea bargain. >> this is a guy who kicked in a door with a group of people wearing masks, went in and held a family hostage. terrorized a family. takes a special kind of mind to do something like that. >> strickland's attorneys point out that their client this h. no history of violence at all.