Officials halted Clayton Lockett's execution Tuesday when he convulsed violently and tried to lift his head after a doctor declared him unconscious. He later died of an apparent heart attack.
White House spokesman Jay Carney says President Barack Obama believes evidence shows the death penalty doesn't effectively deter crime. But he says Obama believes some crimes are so heinous that the death penalty is merited. He says the crimes in Lockett's case are indisputably heinous.
But Carney says the U.S. has a fundamental standard that the death penalty must be carried out humanely. He says everyone would recognize that this case fell short.
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