Van der Sloot arrested on charges of wire fraud , extortion . Ricardo Flores , slaying victim 's father , arguing with police . Joran van der Sloot files appeal to ruling upholding sentence of his arrest , detention . As the presiding judge , Morales has the duty to be the chief fact-finder , legal experts told CNN . Judge is collecting testimony from several potential witnesses .
Van der Sloot arrested on charges of wire fraud , extortion . Ricardo Flores , slaying victim 's father , arguing with police . Joran van der Sloot files appeal to ruling upholding sentence of his arrest , detention . Judge is collecting testimony from several potential witnesses .