From a distance of 70 metres and through the sight of his machine gun, Assaf could tell that the Palestinian man was aged between 20 and 30, unarmed and trying to get away from an Israeli tank. But the details didn't matter much, because Assaf's orders were to "fire at anything that moved".
Assaf, a soldier in the Israeli army, pressed the trigger, firing scores of bullets as the body fell to the ground. "He ran and I started shooting for a few seconds. He fell. I was a machine. I fire. I leave and that's that. We never spoke about it afterwards."
It was the summer of 2002, and Assaf and his armoured unit had been ordered to enter the Gaza town of Dir al Balah following the firing of mortars into nearby Jewish settlements. His orders were, he told the Guardian, "'Every person you see on the street, kill him'. And we would just do it."
It was not the first time that Assaf had killed an innocent person in Gaza while following orders, but after his discharge he began to think about the things he did.
"The reason why I am telling you this is that I want the army to think about what they are asking us to do, shooting unarmed people. I don't think it's legal."