If someone has taken this card, is another player able to seize it from them by trading in trophies at the police station to become the deputy themselves? If so, do they take the Patrol Wagon (whether it has been discarded or not) and/or the Deputy's Revolver? It isn't clear whether this would be officially having it lost or stolen.
This is explicitly answered in the FAQ:
Q: Can an investigator trade in trophies to become the Deputy if another investigator is already the Deputy (the existing Deputy would stop being Deputy)? If so, do they acquire the Patrol Wagon and/or Deputy’s Revolver if they are still in the other investigator’s possession?