There is a monster on the loose, a serial killer murdering young women near Oklahoma City.  On each corpse he writes his name in blood:

THE TIN MAN

But while the villain claims to be heartless, he’s not beyond making a mistake. This time he left his prey alive, and ex–homicide detective Nick Lassiter plans to use her to crack the case wide open. Yet, Ravyn Skyler is nothing like he expects. She remembers little of the crime, and for a victim she has a deep reserve of quiet strength. In her eyes he sees both helpless waif and merciless vigilante, in her kiss he tastes both passion and power. With a tale of a tin man, it only seems fair that there’s a witch. And this witch guards a secret that threatens not only their lives, but their souls.

A broken heart drove her away--a family tragedy brought her back.

After her parents' murder/suicide, Isabelle Connelly returns to her home town to settle their estate. But a year later, with her business concluded, Isabelle still hasn't left, even though she has every reason to. The townspeople shun her because of her family's history of mental instability, she hasn't gotten over her feelings for the man who shattered her heart, and now she's a suspect in a murder and mysterious house fire.

Someone is out to frame Isabelle for the crimes. Failing that, it appears they plan to make Isabelle their next victim.

After her parents' murder/suicide, Isabelle Connelly returns to her hometown to settle their estate. But a year later, with her business concluded, Isabelle still hasn't left, even though she has every reason to. The townspeople shun her because of her family's history of mental instability, she hasn't gotten over her feelings for the man who shattered her heart, and now she's a suspect in a murder and mysterious house fire.

Someone is out to frame Isabelle for the crimes. Failing that, it appears they plan to make Isabelle their next victim.