(Windom, MN)  --  Alcohol may be a contributing factor in a one-vehicle crash near Windom last night (Wed) that left a southwest Minnesota woman dead.   The State Patrol says an S-U-V driven by 23-year-old Hollie Mattison of Mountain Lake drifted into the ditch on Highway 60 and rolled.  Mattison was thrown from the vehicle.  She died at the Windom Area Hospital.  The accident report says Mattison was not wearing a seat belt and there was alcohol in her system.