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St. Xavier woman pleads guilty in daughter's death

Published On: Jul 24 2013 03:40:20 PM MDT
GAVEL  RED BLUE
BILLINGS, Mont. -

A woman from Montana's Crow Reservation has pleaded guilty to killing her 3-year-old daughter by throwing her from a moving pickup truck after a night of drinking with her brothers.
    
The U.S. Attorney's Office says 25-year-old Mary Agnes Leider of St. Xavier pleaded guilty Wednesday to second-degree murder in the December 2012 death of Tenielle Big Day. U.S. District Judge Donald Molloy scheduled sentencing for Oct. 22. Leider is detained.
    
Prosecutors say the girl died of severe head injuries caused by being thrown out of a vehicle moving between 45 and 51 mph.
    
Leider's brother told investigators they were driving around at about 4 a.m. on Dec. 3 when Leider opened the pickup door and threw the girl out onto the highway south of Hardin.
    
Tests showed Leider's blood-alcohol level was over 0.24.