By Abigail O’Leary & S P Jones A brave mum was tragically killed in a mass shooting in Austin, Texas, while shielding her young son from bullets. Sabrina Rahman, 24, was out for a walk with her 18-month-old son when the horrific incident occurred on Tuesday. Her husband, Ishraq Islam, spoke to KVUE about the terrifying ordeal that occurred just 24 hours after they had moved into their new home. Islam described how Sabrina had already witnessed suspect Shane James, gun down 32-year-old Emmanuel Pop Ba, a handyman who was helping them move into their new home. In terror she then started running …