Darktown by Thomas Mullen
Darktown is a mystery. A different kind of mystery that takes place in the era of Jim Crow laws, specifically in Atlanta. Boggs and Smith, partners, are part of the new black precinct in Darktown (the black section of Atlanta). When they find a murdered girl in a trash heap they take it upon themselves to solve the mystery after finding out the name of the white ex-cop they last saw her with was wiped off their report. I thought it was an excellent story!