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A maths teacher was gunned down by a hitman who appeared to single him out in a busy crowded street before calmly walking away.
Eduardo Reyna was shot in the back with a handgun while strolling along the pavement - as the two women he was walking with fell to the ground when the assassin opened fire.
Three muzzle flashes are seen from the killer's handgun before his 27-year-old victim collapses in a heap on the ground.
The murder was filmed on CCTV in the colony of Vista Hermosa in the city of Cuernavaca, in central Mexico.
The clip begins with showing the scene of a bustling street and a man who appears to be mooching around talking on his phone.