NEW : Forensic experts must carry out DNA tests on body parts to see who they belong to . NEW : The judge has until Sunday evening to decide whether to press formal charges . Galicia regional police chief Jaime Iglesias told reporters Friday that the driver was under police detention because of `` a crime . '' Comment: At least 78 people died in the train crash near Santiago de Compostela in Galicia .
NEW : Forensic experts must carry out DNA tests on body parts to see who they belong to . NEW : The judge has until Sunday evening to decide whether to press formal charges . Comment: At least 78 people died in the train crash near Santiago de Compostela in Galicia .