Swedish prosecutors said Wednesday they had closed their investigation into the 1986 murder of prime minister Olof Palme as their main suspect, a Swede opposed to Palme's leftwing policies, was now dead. "We can't get around one person as the perpetrator. He is Stig Engstrom," chief prosecutor Krister Petersson told reporters, referring to a man dubbed "the Skandia man" in Swedish media. "Because he is dead, I can't press charges against him, and have therefore decided to close the investigation," he said. Engstrom was questioned as a witness early on in the investigation as he was near the murder scene but police deemed him unreliable as he changed his story several times. po/wdb