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A police officer facing re-trial in the death of Freddie Gray in Baltimore is ordered to testify against other officers.

FOX's Rachel Sutherland reports:

Maryland's highest court has ordered Officer William Porter to testify against his fellow Baltimore police officers in the Freddie Gray case.

Officer Porter's own trial, of manslaughter and misconduct charges ended a hung jury in December. He'll be re-tried this Spring. Five other officers also face trial. Gray suffered a catastrophic spinal cord injury in a Baltimore police van. His death led to violent protests in the city.

The driver of the van, Officer Caesar Goodson, faces the most serious charge: second degree depraved heart murder.

Rachel Sutherland, FOX News.