i had a friend rec me a story that i had never seen before where after mary died john was taught to hunt by an insane hunter.  instead of hunting supernatural things, hunted people who were ungodly because they were the ones who become possessed by demons and are therefore responsible for his wife's death.  sam leaves for college and jess still dies, but bobby comes to see him when her death matches a profile ash and ellen have about the yellow eye demon.  sam realizes there are hunters that are not crazy like his dad and friends.  he go to get dean to help him hunt.  the story is them using what they were taught while kids and learning to hunt evil. i had read to halfway thru season 1 and don't know if it is a wip, big bang, or what.  
please help.