another inmate to death. this time for much less than $36. but gilbert made it clear to us, in prison, things aren't always as they seem. >> everybody wants to talk about i killed somebody over a carton of cigarettes. you know, it's not a carton of cigarettes. that may be the catalyst that leads to something, but, you know, if somebody owes me a soda pop or i owe him a soda pop and they come to me and say i need to get that soda pop you owe me, i spit in their face and talk to them like they a bitch or something and they kill me, whose fault is it? it isn't about the soda pop no more. on the street, you call the police to put a stop to it. what do you do in here? i tell you what you do, you go get you a knife and you stab that son of a bitch and say you ain't taking nothing else. that's the end of that. here's what happens when you come to take something from me. >> a-1 to a-4. >> gilbert's life behind bars is often punctuated by his frequent