Death penalty facts that may surprise you

In Oklahoma, a botched lethal injection preceded a prisoner's death by heart attack .

In Ohio, a lethal injection of a new combination of drugs preceded the death of an inmate who reportedly gasped and convulsed before he died, CNN reports.

On Mississippi's death row, doubts about a woman's guilt delayed her execution and then led to a new trial.

In Louisiana, a man who faced a death sentence for 30 years was exonerated and set free .

These and other incidents are prompting many to take a fresh look at America's justice system and its use of the ultimate punishment. Some continue to support death as an option for the most terrible crimes. Others have come out against it .

In the infographic above, statistics by the Death Penalty Information Center offer a fascinating snapshot of executions in the United States, including how they're done, where they take place and how many prisoners are executed each year.