Troy Davis appeal placed on hold

The U.S. Supreme Court has recessed for the summer without taking action on Georgia death row inmate Troy Anthony Davis' latest appeal, likely delaying any action on the convicted cop killer's case until the fall.

Davis, of Savannah, was convicted in 1991 for the slaying of Savannah police officer Mark MacPhail. Supporters say he deserves a new trial after several key trial witnesses recanted their testimony. Davis' lawyers appealed to the Supreme Court after a lower federal court denied his request for a new trial in April. The Supreme Court won't reconvene until September. Davis' case has become a rallying point for death penalty opponents worldwide.

His supporters include former President Jimmy Carter, Nobel Peace Prize winner Desmond Tutu and Pope Benedict XVI.