Oklahoma Gov. Mary Fallin has ordered a review of the state’s execution procedures following the botched lethal injection that induced a prisoner’s fatal heart attack. The prisoner, Clayton Lockett, had initially won a stay for challenging the secrecy surrounding the untested execution drugs. But Fallin overruled Oklahoma’s Supreme Court last week and ordered the execution to proceed. On Wednesday, Fallin defended the death penalty and appointed a Cabinet member to conduct the review.

Gov. Mary Fallin: “I believe the death penalty is an appropriate response and punishment to those who commit heinous crimes against their fellow men and women. However, I also believe the state needs to be certain of its protocol and its procedures for executions and that they work.”

Fallin has delayed all executions until the review has been completed. Oklahoma officials say Lockett suffered a vein failure, but critics say that claim could mark an effort to hide a problem with the untested chemicals. The botched execution has reinforced calls for abolishing the death penalty. The White House says it backs capital punishment but called Lockett’s death inhumane. In response, Maria McFarland of Human Rights Watch said no execution can ever be carried out in a humane way.

Maria McFarland: “Last night’s events were just horrifying. The U.S. has been making progress in abolishing the death penalty in a number of states, yet it’s clear that some states are just so obsessed with carrying out this already inherently inhumane and irreversible punishment that they’re going to absurd and cruel lengths to carry it out.”