. >> at the time of our visit, bobby gilbert had been at alabama's home and correctional facility for only four years. but he first landed in prison at the eighth of 18. he told us how a minor dispute over money led him to murder an acquaintance. >> he told me the only way i'd get my money was over his dead body. >> how much money did he owe you? >> $36. i paid $37 for the gun i killed him with. >> once behind bars, gilbert's violent temper led to numerous other crimes, including stabbing 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, you know, i killed somebody over a carton of cigarettes. it's not a carton of cigarettes. that may be the catalyst that leads to something but, you know, for -- if somebody owes me i soda pop, or i owe them 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 wasn't about the soda pop no more. on th