A University of Cincinnati police officer who fatally shot an unarmed black man has been charged with murder after a grand jury investigation, the Hamilton County prosecutor said on Wednesday.

Prosecutor Joseph Deters called the July 19 shooting of Samuel Dubose, 43, ¡°senseless¡± and totally unnecessary.

The incident was the latest in a series of fatal police confrontations across the United States that have raised questions about police use of force against minorities.