This was an AU where John Winchester believed in the supernatural but it was not real. He, Dean and Sam lived on Camp Chitaqua along with Castiel and one other person(Chuck?). I remember that John and Dean were together and that Chuck was abusing Sam but Sam did not want to tell Dean. I also remember that they were trying to exorcize Meg or Ruby and they ended up killing her in a storage shed. I think Sam had to clean it. Gabriel was an FBI agent who was investigating John. There was a shoot out and John, Dean, and Castiel ended up dying. It ended up with Gabriel and Sam getting together after like 5 years of Sam being in foster care and being abused. Gabriel was a professor at a university. I hope someone remembers this story because it has been bugging me.