Mexican aviation crash investigators have ruled out sabotage as the cause of the Learjet 60 accident that claimed all nine on board, including the country's Interior Minister. There was concern that the accident could have been an act of sabotage, in part because the Interior Minister, Juan Camilo Mourino, had been a high-profile force in the government fight against drug traffic. The November 4 accident occurred on approach to Mexico City. The investigation points to a wake-turbulence encounter as the contract Learjet pilots took as much as a full minute to respond to ATC requests to slow their approach speed. As a result, they closed dangerously close to a Boeing 767-300 on final approach, leading investigators to believe the Learjet encountered its wake turbulence.