A Hunter's Curse (A Supernatural Fanfiction)

Raelynn Michaels grew up with the Winchester brothers.
Her daddy died on a hunt with John Winchester. John promised her father in his dying moments that he would protect his precious girl and watch over her as his own.
Everything Raelynn knows comes from the Winchesters. She was taught to hunt, taught to kill, taught to protect others, to put the needs of others before her, even if it did mean dying. She is part of the family business.
When John goes missing, Dean stops at nothing to find his father, which of course means taking on the fiercest of monsters. In the process Raelynn is hurt time after time again and Dean can't take it. Sam is at college and his father is missing; he can't afford to lose Raelynn too.
So in desperate measures to protect her, he leaves her with nothing more than the old battered up journal of John Winchester. He leaves her for her own good. He wants her to live an actual life, to escape this hell of a life.
A decade later, Raelynn finds herself working with the LAPD. To prove she is indeed worthy enough the become the first female on the force, for a year she is on probation.
Case after case, she solves with her two fellow officers until one.
From the start Raelynn knows that something is off. It's not natural at all. As a matter of fact, it's all supernatural.
Calling on the brothers after a decade long separation, the three reunite and take on this supernatural being.