Rumor about missing slaves is a paper note in the Fallout 4 add-on Nuka-World.
Location
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In the Nuka-Town backstage, on the floor next to a suitcase under some shelves in the far western room.
Transcript
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Okay... I don't know nothing for sure. But I heard some talk about them slaves that went missing.
Don't go saying you heard this from me! But...
I wouldn't eat anything that didn't come out of a box for a little while.
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