39-year-old Robert Marks, the former assistant principal accused of killing and dumping a pregnant teacher's body in a ditch pleaded "not guilty" in court Tuesday morning. Marks was arraigned on charges of second degree murder and first degree feticide in the death of Lyntell Washington.

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A Grand Jury in Baton Rouge has formally charged the former assistant principal accused in the death of Lyntell Washington and her unborn baby.

39-year-old Robert Marks was handed a true bill for second degree murder and second degree feticide.

Washington was positively identified as the badly decomposed body found in a ditch in Rosedale, and autopsy reports show she died from a gunshot wound to the head.

East Baton Rouge Parish Coroner Beau Clark said dental records established the body found in early June was indeed that of  40-year-old Lyntell Washington that was found in a roadside ditch in Iberville Parish.