(AP) — Nebraska abolished the death penalty on Wednesday in a landmark veto-override vote backed by an unusual coalition of conservatives who oppose capital punishment. Nebraska lost its ability to execute inmates in December 2013, when one of the three lethal injection drugs required by state law expired. A Nebraska State Patrol spokeswoman said Wednesday that the agency was investigating death threats left on the answering machine of a state senator who supports the repeal. The last time lawmakers passed a death penalty repeal bill was in 1979, but senators at the time didn't have enough votes to override a gubernatorial veto.