Details of Oklahoma's botched April lethal injection revealed in just-released documents detail just what went wrong, and give a sense of why the fumbled execution sparked a federal review of execution methods nationwide. One medic had such trouble inserting an IV that the inmate being put to death suggested he might have a better vein on his right leg. And the injection team ultimately went with running a line through a vein in his groin, even though they didn't have the right sized needle — leading the inmate to wake up midway through his execution. "He said, 'I've got a vein in my leg, my right leg,'" the medic recalled. "And I said, 'Well, I don't like to do those because they cause a lot of clots.' He said, 'Does it really matter?'"