In the bright morning hours of 28 October, a busy square in an affluent area of north-west Tehran became the scene of a bloody murder.
This was no ordinary crime. It was more like a public spectacle, dragging on for an excruciating 45 minutes before the victim bled to death.
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Not so long ago, Iranians took pride in their collective sense of responsibility and compassion. It was normal and expected that people would intervene to try to defuse any public altercation.
Not any more it seems. In the video from October, lurid comments can be heard while shop-keepers joke and sip mugs of tea as they watch the attack on their doorstep.