(Portland, OR) -- A Multnomah County grand jury has charged a man with murder in the death of a 15-day-old child. Last May, Portland Police officers responded to a hospital where Arlo Darniello-Arroyo was being treated for life-threatening injuries. He died four days later. The medical examiner determined the infant died from blunt force trauma. Felipe Arroyo Junior was arrested in Portland and charged with Murder in the Second Degree, assault, attempted coercion and witness tampering.