If these are the perils of the system, why have a death penalty? Many people would answer that executions deter others from committing murder, but I found no evidence that convinced me. For example, Illinois, which has a death penalty, has a higher murder rate than the neighboring state of Michigan, which has no capital punishment but roughly the same racial makeup, income levels, and population distribution between cities and rural areas. In fact, in the last decade the murder rate in states without the death penalty has remained consistently lower than in the states that have had executions. Surveys of criminologists and police chiefs show that substantial majorities of both groups doubt that the death penalty significantly reduces the number of homicides.