Hunting by Moonlight

Someone is killing omegas. Three bodies have been found so far, all within a short radius. That doesn't bode well, and Sheriff Kelly Townsend has appealed to the Council for help hunting for the murderer before any more die. They agree but tell him that since the dead omegas were all killed at night, they have reached out to get him someone who does his best work at night. The thing is, his help is a vampire. An omega vampire.