FLORENCE, Ariz. — The State of Arizona executed Richard Djerf by lethal injection on Friday at Arizona State Prison Complex-Florence.When asked if he had any last words, Djerf said he "did not."Witnesses to the execution said the inmate officially died at about 10:40 a.m. after some time was spent struggling to find a vein on Djerf's arm to insert a needle.The death penalty comes roughly 30 years after he admitted to killing four members of a Phoenix family.Court records show Djerf committed the murders for retribution of a "petty theft" of Albert Luna Jr., whose parents and two siblings were...