Amanda Davila, a 27-year-old school bus monitor, was sitting toward the front of her bus on Monday morning, focused on her cellphone and wearing her earbuds. The driver of the bus hit a bumpy patch of road, and the girl, Fajr Williams, slid down in her chair. Ms. Davila was arrested on Wednesday. On Thursday, the Somerset County prosecutor, John P. McDonald, announced that she had been charged with second-degree manslaughter and second-degree endangering the welfare of a child. Prosecutors said Ms. Davila was “utilizing a cellular telephone while wearing earbud headphone devices in both ears.”

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Persons: Amanda Davila, Fajr Williams, Davila, John P, McDonald, Prosecutors Locations: New Jersey, Somerset County