NEW : ` ` I started CPR on my own son , '' the victim 's father says . CNN 's Dan Rivers contributed to this report from Birmingham , England . Resident : Businesses that remain open all night are closed at the first sign of trouble . The three are killed while trying to protect local businesses from looters , police say . British police have not tied their deaths to the murders .
NEW : ` ` I started CPR on my own son , '' the victim 's father says . Resident : Businesses that remain open all night are closed at the first sign of trouble . The three are killed while trying to protect local businesses from looters , police say . British police have not tied their deaths to the murders .