Published: Nov 11, 2010 4:39 PM EST
Updated: Nov 11, 2010 1:39 PM EST

OCALA, Fla. (AP) - The Florida Supreme Court has unanimously upheld the murder conviction and death sentence for a man convicted of killing a retired Michigan woman in a central Florida retirement community.

The high court ruled Wednesday that Renaldo McGirth committed the murder in a cold, calculated and premeditated manner; and that the murder was especially heinous, atrocious or cruel. McGirth was found guilty of first-degree murder, attempted first-degree murder, armed robbery and felony fleeing in Diana Miller's death in 2006.

Miller and her husband had moved to The Villages after selling their house in the Detroit suburb of Northville. Miller's husband, James, was also shot in the attack, but he survived.

Co-defendant Jarrord Roberts has been sentenced to life in prison.