The Oregon Supreme Court, for the third time in two decades, has overturned a death sentence against Robert Paul Langley Jr. for a murder committed in 1987. The decision announced Thursday sent the case back to Marion County Circuit Court for further proceedings. District Attorney Walt Beglau has not announced whether he will seek the death penalty for Langley. Because four of the sitting justices have worked for the Oregon Department of Justice, which represents the state in death-penalty cases, they did not take part in Thursday’s decision. The three remaining justices were joined by a retired justice and a Court of Appeals judge to decide the case.