The first bad point of death sentence is that it cause suffering to prisoners. Hanging is barbarous, so this practice should be banned nowadays. According to the principle of science in hanging, the skull or spine neck level is 2-3-4 is deducted cause the base of the brain blood tear and died quickly .If a fall from that high neck may be dropped out off the shoulder. And how to kill is shooting. Because sometime shooting risk error to death so the killer may should the prisoner more then once affect the prisoner to torture. All the methods mentioned is barbarous. Should be changed to suit the method of killing to fit the era.