Family mourns student dead in possible carbon monoxide poisoning

A Drayton Valley family is in mourning after the sudden death of a teenage girl found unconscious in a running vehicle early Thursday. 
RCMP found 16-year-old Shaina Ridenour and a 17-year-old boy in a running vehicle in the town southwest of Edmonton, a family member said. She was rushed to hospital, where she was later pronounced dead.  
In a message to Postmedia Friday, Ridenour’s sister Breyanna Ridenour wrote that her family is still unsure of exactly what happened but