"A medal from the second Doom Book."
The Wolf Medal is an key item used in puzzles that appear in Resident Evil 2.
It is one of two medals needed to stop the flow of the water in the sewers, the second of which is the Eagle Medal.
The Wolf Medal can be found in a small alcove on the Sewer Passage 1 by searching a dead Umbrella mercenaries corpse, directly in front of the fan that you have to climb into.
In Claire A, Sherry will find the wolf medal in a dumpster when she was separated from Claire, Claire will found it next to Sherry after the Alligator fight.