The state of Alabama is asking a federal judge to allow an execution to move forward later this week. The state attorney general's office filed documents Monday opposing a bid by 65-year-old Vernon Madison to postpone his execution, now scheduled for Thursday. Madison's lawyers claim strokes and dementia have left the prisoner incompetent to face lethal injection for killing a Mobile police officer in 1985. But prosecutors say an expert determined Madison understands the court process and the reason he's facing the death sentence despite a stroke. They say there's little chance Madison would win an appeal.