Leader of the Canterbury Commons search party that attempted to locate the whereabout of a good friend named "Cheryl," Manny Koch is the only visible remains of the group; the rest are either buried or chopped into manageable pieces and stored on gore bags. Manny is dead when you approach him. After inspecting the body, prepare for a Behemoth!
This character is not designed to be alive. For some reason, he is very aggressive and will attack the player if resurrected using the console or found before finishing the optional quest.
It is possible to find Manny alive. To make sure he lives, go to the spot where he appears and clear out the super mutants before searching for the logs. Then when you get there Manny will be standing next to the train cart. If you kill him he leaves a finger if you have the Lawbringer perk.
It is also possible that he will simply not spawn due to a coding error.