Dark Truth by Mariah Stewart

Nina Madden arrives in her home town of Stone River, sixteen years after her father was imprisoned for rape and murder. He died in prison, with an appeal still ongoing, and now her step-mother has died. Hoping for a friendly reconciliation with Kyle, her stepbrother, Nina looks forward to closing things down and returning to her business. When an attorney tells her the house was left to her and the priest gives her a box of her father's belongings with letters to her and his deceased wife, old emotions rise to the surface. When new murders surface, casting doubt on her father's guilt, Nina turns to Regan Landry for help. Twists and turns make for thrilling reading.