How a student's death in Mexico raises questions about police violence

Tuxtla Gutierrez, Mexico – Jesus Alain Vasquez Perez's final moments were captured by a grainy surveillance camera hoisted high above the Chicoasen highway.

The footage is only seconds long. Suddenly, three vehicles zoom into view: one pick-up truck pursued by two police cruisers, their sirens flashing red against the ink-black night.

One of the police vehicles overtakes the pick-up. It cuts in front, manoeuvring as if to slow the pick-up down. But in that moment, a figure falls from the bed of the truck.

It rolls onto the road. It stops moving. The second police cruiser swerves to avoid it.