It's my understanding that he can shoot an unlimited number if possessing a Trapping License.
Certified Wolf Trappers: The statewide trapper harvest
limit is 5 wolves per trapping season. An additional 5 wolves
(for a total of 10) may be taken by trappers in the Panhandle,
Clearwater, Upper Snake, and Salmon Regions,
So this means a trapper can get 20, a hunter/non trapper 10. Good work although not sure what ya do with 19 wolves.