information:classification
Modern era

A study found that at least 34 of the 749 executions carried out in the U.S. between 1977 and 2001, or 4.5%, involved "unanticipated problems or delays that caused, at least arguably, unnecessary agony for the prisoner or that reflect gross incompetence of the executioner". The rate of these "botched executions" remained steady over the period. A study published in The Lancet in 2005 found that in 43% of cases of lethal injection, the blood level of hypnotics in the prisoner was insufficient to ensure unconsciousness. Nonetheless, the Supreme Court ruled in 2008 (Baze v. Rees), again in 2015 (Glossip v. Gross), and a third time in 2019 (Bucklew v. Precythe), that lethal injection does not constitute cruel and unusual punishment.