. >> after surveying the crime screen, investigator chuck wheeler examines the weapon. >> it's an x-acto blade from a hobby craft box. took a little bit of time to put a couple pieces of wood together to hold it in place. a ray razor blade type weapon will do a lot of damage. >> the suspect, michael ray stafford, is brought in for questioning. >> have a seat right there. do you want to tell me where you got the knifes from? >>> coming up -- >> oh, i'm innocent. >> investigator wheeler finds both the suspect and the victim unwilling to cooperate. >> the victim doesn't want to be labeled as a snitch. i am totally blind. and i live with non-24, a circadian rhythm disorder that can throw my days and nights out of sync, keeping me from the people, places, and things i love. the people i love have always been there for me. and now, i'm there for them, too. talk to your doctor, and call 844-214-2424 to learn more. >>> when you throw 200, 300 men in close confines like that, you're going to have violence. i mean there's just no way around it. you put a dog on a short chain and taunt him long eno