A 16 year old girl from Southern Ontario is dead following an ATV accident in Greenstone on the weekend. OPP Constable Shona Camirand says the girl was driving the vehicle at the time of the accident on Saturday evening and was unresponsive when police arrived. The victim is identified as Arlynne Holyer of St. Catherines. Police say she was thrown from the vehicle she was driving after it struck a fallen tree.