Kenya's Westgate shopping mall reopened for business on Saturday, almost two years after Somali Islamists stormed in and massacred 67 shoppers and staff in four days of carnage.
He becomes the fifth person to die after being shot Thursday by Mohammad Youssuf Abdulazeez, 24, who opened fire on two military centers.
Jala al-Abadi was taken from his home with his phone and laptop on June 4 and executed on Wednesday by firing squad after being sentenced by an IS court.