It may seem odd that so many people would support the death penalty while also acknowledging that innocent people could very well be put to death. Part of that may be accepting the inherent risk that accompanies something as irreversible as death, but a part of it may also simply be that people are not paying that much attention to capital punishment. Executions in this country are generally carried out at night inside heavily guarded prisons with just a small handful of witnesses, so the public rarely takes note of them.
Nearly half of Americans told Pew they think the number of people put to death has remained steady or increased over the last decade. In reality, the number of executions has fallen in recent years, dipping last year to the lowest number in two decades. As we noted last year, support for the death penalty did not really budge after high-profile botched executions, and it was unclear how many people paid much attention to these incidents or the people who were exonerated.
So why do people still support it? Well, most people — a little more than six in 10 — say that the death penalty is morally justified when someone commits a crime like murder. About half as many people say it is morally wrong. The same number of people who think it is morally justified also do not believe that the death penalty can deter serious crimes.