Retired Generals Tomas Angeles and Ricardo Escorcia, active General Roberto Dawe, along with Lieutenant Colonel Silvio Isidro de Jesus Hernandez, were detained two months ago as part of an investigation into their alleged links to the once-powerful Beltran Leyva drug cartel. Mexican law allows for preventive detention in some cases to stop suspects from fleeing, to guarantee they will attend a trial and to protect victims and witnesses. The four men were being held in custody, but will move to a federal prison following a judge’s decision to arrest them. The arrests are a scandal for the Mexican army, which has been at the heart of the government’s war on drugs. More than 55,000 people have been killed in drug-related violence since Calderon launched an army-led offensive against the cartels shortly after taking office in December 2006. Calderon leaves office at the end of November.