Little Girl Vanished by Denise Grover Swank

With a friend’s child missing, and the police failing, disgraced ex-detective Harper enlists the aid of a former crime boss to untangle a mystery that strikes too close to home.

Disgraced, ex-detective Harper Adams is perfectly content wallowing at rock bottom. She’s lost her job, house, and reputation, and it only gets worse when she’s forced to move back home to Jackson Creek, Arkansas, the one place she swore she’d never return.
But everything changes when she gets chilling news. A childhood friend’s daughter is missing…and it’s eerily reminiscent of Harper’s sister’s kidnapping and murder two decades ago.
Not her business.
Except with the police fumbling the case at every turn, Harper realizes she might be the only one who can save the girl.
And she might need the help of James Malcolm, a former crime boss, to do it.