Too far gone - John Ramsey Miller

Alexa Keen is the best the FBI has to offer, a special agent who can achieve the impossible: finding victims of abduction before they can be killed. Casey LePointe West is heiress to one of the greatest fortunes in America. Now, as Hurricane Katrina roars toward New Orleans, these two women are finding common ground in a city of ghosts and grandeur...Alexa as the FBI’s representative in a case guaranteed to destroy careers, and Casey as a woman whose husband has gone missing—and who herself may be the next victim of a brilliant manipulator’s rage.

From the violent wards of an insane asylum to the primordial Louisiana swamps, Alexa is entering the darkest corners of a deadly mystery, peeling back layers of family secrets, hidden relationships, and a twenty-five-year-old crime.
And as a raging hurricane gathers strength, she is plunged into a frantic race against time, in the eye of a storm of violence...and just where a ruthless killer wants her to be.