Hard Line — Michael Z. Lewin

The Edgar Award�"nominated author of the Albert Samson mysteries returns with “another first-rate, fast-moving police procedural” featuring Lt. Leroy Powder (Publishers Weekly).
 
Nineteen years in Night Cover for the Indianapolis PD and suddenly Lt. Leroy Powder gets a new job description. The surly cop may have honed his instincts for solving crimes, but he can't tell if heading the Missing Persons Bureau is a promotion, demotion, or something in between.
 
And then he gets a new partner thrown at him. Sure, Sgt. Carollee Fleetwood is a decorated cop who took a bullet for a fellow officer, but all Lieutenant Powder sees is a woman rolling around in a wheelchair. And there's no time to be sensitive and diplomatic when there's a job to be done.
 
As Powder and Fleetwood test each other, they never lose sight of the case at hand -- no matter how strange the details. Case by case, from missing loves to missing lovers, the two seasoned detectives slowly gain each other's grudging respect. And no matter how vicious the jokes get, neither will ever crack a smile.
 
Hard Line is the 2nd book in the Lt. Leroy Powder Novels, but you may enjoy reading the series in any order.