A woman previously charged with assaulting a 3-year-old boy has been indicted for his murder. 

Maria Buie, 23, was charged Friday with second-degree murder for injuries she allegedly inflicted on the child shortly before he was found unresponsive in his Alpine Street home in Roxbury on Jan. 31 

The boy was rushed to Boston Medical Center, where he died of his injuries on Feb. 2. 

The Office of the Medical Examiner determined the child’s death was a homicide caused by blunt force trauma. 

According to an investigation by Boston Police homicide detectives, evidence and witness statements suggest Buie was alone with the child after others saw him healthy and uninjured. 

Buie was held on $100,000 bail at her arraignment on assault and battery charges last month. 

Her arraignment on the murder charge has not yet been scheduled. 

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