A woman from the Blackfeet Nation of Montana pleaded not guilty to charges that she murdered her 2-year-old son and his body in the trunk of her car, The Great Falls Tribune reported.

Summer Many White Horses, 31, allegedly killed James in late May at her home off the reservation. His badly decomposed body wasn't discovered until September early September, after Many White Horses had been arrested multiple times.

Many White Horses told investigators her son's death was accidental. An autopsy is pending.

Get the Story:
Woman pleads not guilty in toddler's death (The Great Falls Tribune 10/3)

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