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The charges, including the shooting death of a police officer, could bring the death penalty.

A Massachusetts federal grand jury returned a 30-count indictment against Boston bombing suspect Dzhokhar Tsarnaev on Thursday, charging the 19-year-old Cambridge man in the deaths of three bombing victims and the separate slaying of a Boston-area campus police officer.

The officer was fatally shot three days after the April 15 assault on the Boston Marathon.

Tsarnaev, also facing charges of using a weapon of mass destruction and the use of a firearm resulting in death among other criminal counts, faces a possible death sentence on 17 of the charges if convicted.