EDMONTON -- The 13-year-old girl who was killed in northeast Edmonton last Friday died of a stab wound, the Edmonton Police Service said.
Sierra Chalifoux-Thompson died in hospital after she was stabbed in the area of 75 Street and Mount Lawn Road NW at approximately 11 p.m.
An underage girl was charged with second-degree murder on Monday.
Sierra's mother, Angela Chalifoux, told CTV News the two girls knew each other from school.
EPS has ruled Chalifoux-Thompson's death a homicide.
About 200 people attended a vigil for her Thursday night.
