The Researcher's Dilemma mission in Call of Duty's DMZ mode involves stealing research documents and replacing them with a fake copy.
Players must first gain access to the Veterinary Office at the Vondel Zoo to find the researcher's notes.
The mission has three main objectives: find the research notes, deliver them to a church near the castle, and replace them with fake notes in the veterinary office.
Players need a key to the Veterinarian Office or a Skeleton Key to access the Animal Care Room where the research notes are stored.
If players don't have a key, they can try to find one in a supply drop at the zoo or complete objectives and contracts to find one.
The Veterinary Office is located in the far Southwest corner of the Zoo, on the first floor.
The False Research Notes can be found in a church located south of the castle complex, on the second floor.
Once players have the false notes, they must deliver them to the veterinary office in the same location where the research notes were found to complete the mission.
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