Contrasting with the conservative policies of Governor Frank Merriam , Olson extended friendly relations with the state 's labor unions . In September 1939 , Olson officially pardoned Tom Mooney , a labor activist and political prisoner accused of plotting the 1916 Preparedness Day Bombing in San Francisco . Olson cited scant evidence against Mooney as the reason for his pardon . The next month , Olson pardoned Mooney 's alleged accomplice , Warren Billings
1916 Preparedness Day Bombing
Preparedness Day Bombing
Culbert Olson