Cavanaugh's Missing Person by Marie Ferrarella

Does she have the key to solving a murder? A Cavanaugh is on the (cold) case!

Kenzie Cavanaugh strives to prove herself to her legendary law enforcement family. But when her missing persons case grabs the attention of infuriating - gorgeous - Detective Hunter Brannigan, she grudgingly collaborates with her work rival to catch a killer. As the partners uncover a lethal conspiracy, they must learn to trust their instincts, and one another, to stay alive.