Today, one of the few major media outlets to consistently oppose the death penalty, the NYT weighs in with an editorial marking the latest year of "progress" on this front. Here's an excerpt. Also see my ebook on the subject, Dead Reckoning, including a compact history of death penalty in the USA and current debates.
In 2013, Maryland became the sixth state to end capital punishment in the last six years. Eighteen states and the District of Columbia have abolished the penalty, and it is dormant in the federal system and the military. Thirty states have had no executions in the last five years.
As it becomes less frequent, the death penalty also becomes more limited to an extremely small slice of the country, and therefore all the more arbitrary in its application.