one such execution made headlines when convicted murderer gary gilmore was put to death in 1977. >> he'llstrapped to the chair. at that point, a medical personnel will place an "x" over the inmate's chest. a hood will be placed on him. this chair does not have a back, for obvious reasons. it is bolted so that it will not tip over. >> a two-inch thick kevlar panel is bolted to the wall to absorb the rounds. five law enforcement officers from around the area in which the crime was committed are assigned to fire simultaneously. one of the rifles is loaded with dummy rounds, leaving each potential executioner with a hint of doubt as to his ultimate responsibility in the process. >> once he is given his last words and he's been given okay to proceed with the execution, a cadence will be given and shots will be fired. >> i chose to be executed by firing squad because the only other option here is lethal injection. that's what they do to dogs. and i don't want them -- i'd rather sit up and take it and have them look at who they're killing. if they was going to execute me tomorrow, i'd be nervous

you kind of wonder if gary gilmore had it better. that's an older reference. sapphiring squad, whether that's not more humane. >> it does make us reflect on the constitution that says no crucial or unusual punishment. that's something that changes over time. the definition of what's cruel and unusual changes. this will start a conversation again because clearly lethal injection when the drug companies are not going to supply the drug. you don't know where the drugs are coming from. >> by the way, that's important, walter. that's what's causing these problems. the drug companies are now refusing to supply the drugs. and it is causing people to -- >> so you have a group of legislators or a governor who is hell-bent to get something done like that, and then this happens, it's also a conscious center saying this is more complicates. >> we also have to note that just yesterday or two days ago maybe, a study came out that it's likely that 1 out of every 25 people executed by death penalty are probably innocent. so we're actually executing innocent people. this is a