November 11th, 2016 
(THE GUARDIAN) — It was still dark when four men boarded the packed commuter bus heading for Mexico City and ordered the passengers to hand over their valuables.
They gathered up mobile phones and wallets, but as they prepared to leave near the town of Toluca, one passenger stood up, drew a pistol and shot the four assailants, killing their leader instantly.
The three injured robbers stumbled off the bus, but the gunman followed them out and shot them dead at the roadside. Then he returned to the bus, handed back the passengers’ belongings and disappeared into the darkness.
Police in Mexico state, which wraps round the country’s capital like a horseshoe, have deployed hundreds of officers in search of the so-called justiciero – or avenger.
But many Mexicans – fed up with crime, corruption and impunity – took to social media to praise the unidentified killer. None of the bus passengers have offered information to police, saying it was too dark to see him clearly.
The case is just the latest of a spate of vigilante killings in Mexico: in southern Tabasco state a taxi driver shot dead two assailants trying to rob him. In the western state of Guanajuato, a witness to the armed robbery of a seafood delivery driver followed and shot at the two suspects fleeing on a motorcycle, injuring one of them, according to local media.
Gema Santamaría, a sociologist at the Autonomous Technological Institute of Mexico, said that while the country has long been plagued by lynchings of supposed criminals, individual vigilante murders are a relatively new development.
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“Public approval of the justiciero has to do with the deep discontent over how the justice system and security services work in Mexico,” she said