The main idea is to represent the judge like the mediaval executioners...the methods to execute are changed but the result is the same. Have to think that we live in 21 century and the same time we still use such a cruel methods for "justice".
This poster belong to
Death is not justice

Our 2010 project asked for the universal abolition of the death penalty.
For us it’s simple. The death penalty is a violation of human rights.
Article 5 of the Universal Declaration of Human Rights states: “No one
shall be subjected to torture or to cruel, inhuman or degrading
treatment or punishment.”
How does that fit with beheading, stoning, hanging, lethally injecting
or shooting someone?