The conference on the death penalty in time of war on terrorism that ended in Tunis was unanimous in believing that the death penalty does not contain or solve the problem of terrorism.

Two professors of sociology and criminology who reviewed more than 1500 cases in which convicted prisoners were later exonerated have found a direct relationship between the seriousness of the crime and miscarriages of justice: "the 'worst of the worst crimes,'” they say, "produce the 'worst of the worst evidence.'"

A prisoner by the name of Samir Deivband was hanged in public in the city of Ilam in front of a crowd of people.

A Death Penalty Information Center analysis of U.S. murder data from 1987 through 2015 has found no evidence that the death penalty deters murder or protects police.