An attorney says an Alabama death row inmate who was seeking to overturn his murder conviction has died.

Attorney Cissy Jackson said Donnis Musgrove died Wednesday night at the Donaldson Correctional Facility in Bessemer, Alabama. Jackson said Musgrove was suffering from lung cancer.

Musgrove, 67, was sentenced to die for the gunshot killing of Coy Eugene Barron in 1986.

However, Musgrove has steadfastly maintained his innocence, and his attorneys contend the prosecution falsified the evidence against him, including witness statements and a shell casing that was used to link him to the slaying.

The attorney general's office previously has declined to comment on Musgrove's legal arguments.