(Al Jazeera) – Flanked by his mother and aunt, Ahmed Mahmoud strolled up the narrow street that leads to the main road in Issawiya in occupied East Jerusalem. It was mid-afternoon in early December 2016, and the 15-year-old had recently earned good grades at school. As a reward, the trio were on an outing to buy him a new pair of shoes, when they encountered a group of teenagers running towards them.