They Went That A Way & That A Way (1978)

In this broad, occasionally slapstick comedy, Dewey and Wallace (Tim Conway and Chuck McCann) are small-town lawmen who are trying to find out where some thieves have hidden their money. With the help of the governor of their state, they are able to enter the prison where the thieves are incarcerated, posing as convicted criminals in the hopes of getting the information from them. When the governor dies without informing anyone of the ruse, they are trapped in prison, as no one else knows their true identity.