An appeals court says an inmate can't sue former Gov. Gray Davis even though he wrongly denied the prisoner parole for three years. The 9th Circuit U.S. Court of Appeals says governors are shielded from private lawsuits because they are essentially acting as judges and that erroneous decisions can be corrected on appeal. But the court did agreed that Davis had no authority to reverse the decision by the California Board of Prison Terms to parole Donald Miller, who was convicted of conspiracy to commit murder. Governors can only review parole decisions on murder convictions.