An Argentine court on Wednesday asked six former presidents to testify in the investigation into the 1995 death of the son of ex-president Carlos Menem. The court requested the testimony of Fernando de la Rúa, Ramón Puerta, Adolfo Rodríguez Saá, Eduardo Camaño, Eduardo Duhalde and Cristina Fernández. All followed Menem as presidents after his 1989-1999 rule.