Execution sought for accused killer Naso SAN FRANCISCO, March 1 (UPI) -- Prosecutors said they will seek the death penalty for 78-year-old Joseph Naso, accused of strangling four women to death in California. Naso entered a not-guilty plea to the murder charges against him Wednesday in Marin County Superior Court, the San Francisco Chronicle reported. Chief Deputy District Attorney Barry Borden said prosecutors would seek to have Naso executed by lethal injection if he is convicted. Naso is accused of killing four women from northern California. All the women were prostitutes and their bodies were discovered in 1977, 1978, 1993 and 1994. If executed, Naso would become the oldest person to be put to death in California, the newspaper said. However, all executions in the state have been on hold since a federal judge found problems with California's lethal-injection death-penalty procedures in 2006. Naso's trial is set to begin later this year.