The arrested Arrest suspects have indicated Statement that the victims were Gulf Cartel members , but the Mexican authorities have not ruled out Legal_rulings the possibility that they were U.S.-bound migrants .

Following the final confrontation Hostile_encounter , the IPCC expanded Expansion the investigation Criminal_investigation to include Cause_to_be_included the immediate events leading Causation up to Moat 's death Death , but ruled out Removing investigating Criminal_investigation how the manhunt Military_operation itself had been conducted Action .

This fact ruled out Removing the `` arms for hostages '' explanation by which the Reagan administration sought to excuse Justifying its behavior .

Investigations conducted Action by the Department of Justice ruled out Removing deliberate criminal activity in 2013 .

The investigation Criminal_investigation into the crash initially closed Process_end inconclusively in May 2013 , having ruled out Legal_rulings a number of factors that had been the subject of media speculation but failing to identify a cause .

the sabotage theory was ruled out Removing despite a threat letter being received Receiving a few days earlier , prompting Causation communist party leader jacques duclos to demand Request an inquiry Criminal_investigation on the matter .