In the weeks before Sedley Alley’s execution in 2006, attorneys argued that a DNA test could prove he did not murder a young female Marine and could even identify the true killer. Tennessee ...

Sedley Alley was strapped to a gurney and put to death in 2006, convicted of killing a 19-year-old Marine two decades earlier. Alley had confessed to the slaying of lance corporal Suzanne Collins ...