Prisoner Thomas Creech, 74, has argued that a repeat execution attempt would violate his constitutional rights against cruel and unusual punishment.

Idaho will now allow lethal injections to be administered via central venous lines in the groin, neck, chest, or arm.

Injecting a central venous line has long been a backup plan under the state's official execution policy, but it has never been used because prison officials said the execution chamber was not designed

The new execution preparation room in Idaho allows medical team to have an alternative method to administer lethal injection chemicals.