Swedish police on Thursday arrested a former neo-Nazi leader that Polish investigators suspect of being involved in the theft of the Arbeit Macht Frei sign at Auschwitz. Swedish prosecutor Agneta Hilding Qvarnstrom said 34-year-old Anders Hogstrom was detained in Stockholm on a European arrest warrant. The infamous sign — which means "Work Sets You Free" in German — was stolen in December from the site of the Nazis' former Auschwitz death camp in Poland. Polish police found it in the woods three days later cut up into three pieces and charged five Polish men with its theft. The Polish prosecutor has said he has evidence that Hogstrom visited Auschwitz with two Poles last spring and told them to steal the sign.