The Mexican transport ministry released a video taken by a ground surveillance camera, that shows the Learjet crash from 5 November.
The video shows that the Learjet 45 approached a Boeing 767-300 at a distance that was less than the norm. Turbulence caused by that 767 might have caused the crash.
A preliminary investigation report also states that the pilot and co-pilot appeared to have been confused about how to operate the Learjet’s controls and failed to follow the air traffic controller’s order to slow down as they approached the airport.
Video
News story: http://www.nytimes.com/2008/11/15/world/americas/15mexico.html