From OPB.org in Oregon:
A collared wolf found dead in Wallowa County in January was likely struck by a vehicle, according to a report released Tuesday by Oregon State Police.
Investigators initially said the 2-year-old female wolf from the Chesnimnus Pack was likely shot to death. The dead wolf was found six miles southeast of Wallowa and was reported to authorities Jan. 8. The wolf had been collared by wildlife officials and named OR-106.