The execution cost of the firing squad is the lowest among all kinds of penalties. It doesn't need any technology or complicated instruments, just a short gun or a long gun, a wall or a tree, and a condemned man can be executed quickly. However, in practice, there are many components attached to the cost of execution. In the early years, shooting a person was a huge project: it was necessary to set up an execution ground, including setting up a target seat and planting a red flag ... There was only one martial law, "It is impossible without a hundred people." From the prison to the execution ground, martial law must be imposed all the way. "There are dozens of people in this team, including road cars, police cars and prison cars." During the "strike hard" period, sometimes there were not enough gunmen and police had to be deployed.
At present, the execution procedure of lethal injection is very simple: criminals are taken to the detention room for execution after arriving at the execution ground, and then lie on the execution bed after entering the execution room. Law enforcement officers tell criminals what to do with standardized and gentle words. The bailiff fixed his upper body, arms and legs with a belt, and then extended the criminal's arm from a small window to the execution room separated by a wall. When the execution order is issued, the bailiff presses the button of the injection pump. After injecting drugs, the forensic doctor can observe the breathing, heartbeat and pulse of the condemned prisoner on the electronic detector. The injected liquid is "non-toxic" in order to minimize the pain of the condemned man.
Therefore, injection is more humane, scientific and civilized than shooting.