MABLETON, Ga. -- Two Mableton residents were indicted by a Cobb County Grand Jury for stabbing an elderly man to death.

Casey Collins and Sarah Cook face charges of murder, aggravated assault, armed robbery and concealing a death in the May 2013 death of 78-year-old Edward Smith of Lilburn.

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Cobb County District Attorney Vic Reynolds said 30-year-old Collins and 23-year-old Cook strangled Smith with a belt and stabbed him in his truck. The victim was Collins' grandfather.

Both suspects are being held without bond in the Cobb County Jail. Their arraignment dates have not yet been set.

Reynolds said several of the charges against the couple carry life sentences upon conviction.

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