An Indiana man convicted of killing four people including his brother and his sister’s fiancé decades ago was put to death Wednesday, without any independent witness, marking the state’s first execution in 15 years. Joseph Corcoran, 49, was pronounced dead at 12:44 a.m. CST at the Indiana State Prison in Michigan City, Indiana, the Indiana Department of Correction said in a statement. Corcoran was scheduled to be executed with the powerful sedative pentobarbital, but the state agency’s statement did not mention that drug.