To Catch A Cannibal

To Catch A Cannibal was going to be a quest in Van Buren, the canceled Fallout 3 by Black Isle Studios.

Quick walkthrough
This quest becomes available once the Prisoner has joined Caesar's Legion. Speak to Terrence about the disappearances of the slaves in the encampment and he'll admit that animals and slaves have gone missing, and encourages you to speak to some of the legionary recruits to get to the bottom of the mystery.

Detailed walkthrough
Travel to the legionary recruit section of the encampment and ask around. Most of the recruits are too scared to admit anything, but if the player has a high enough speech skill or uses intimidation, they'll fess up that they've noticed a shadowy figure leave the encampment in the late night with one of the slaves or animals. Head to the slave pens on the east side and interrogate some of the slaves. You're not going to get much out of anyone, since they're too scared to admit anything either. Ask Nina, the slave girl in the third pen, regarding the disappearances. She'll confess that her mother has been missing for days, and she describes that a "mean-looking" legionary has been abducting slaves. Despite very little information, head back to Terrence. He suggests that Cruz matches Nina's description, and he tells you to investigate Cruz's tent for any evidence that may link to the disappearances.