Texas jailers argued they need to keep the name of the drug connection secret to protect them from threats and harassment.
There have been no U.S. executions in the seven weeks since an Oklahoma inmate died of a heart attack after a botched lethal injection. That soon could change, with three scheduled this week in the span of about 24 hours.
All three states planning lethal injections this week refuse to say where they get their drugs, or if they are tested. Nine executions nationwide have been stayed or postponed since late April, when Oklahoma inmate Clayton Lockett's vein collapsed just as the drug began flowing into his arm. Lockett's punishment was halted, but he died of a heart attack.
Marcus Wellons is scheduled to die Tuesday night in Georgia, followed six hours later by John Winfield in Missouri. John Ruthell Henry's execution is scheduled for Wednesday night in Florida.