I didn't much care for this one. Perhaps it suffered because I had already listened to the fantastic "Love like Thunder" and "Reservation Monsters" both of which play with similar themes of Native American magic and monsters. I felt the "lore" of this one was sloppy and abrupt. In "Love like Thunder" I had a real clear picture of how the magic worked and just what to expect - this one came out of left field. Likewise, I am pretty sure that had I not already been familiar with the concept of skinwalkers, I might have found this one even more jarring and abrupt.
Finally, I didn't even feel that the concept was original. Having the policeman doing the investigation turn out to be the killer is a very, very old hat.