Doing the devil's work

the long version

"Maureen Coughlin is a bona fide New Orleans cop now, and, with her training days behind her, she likes to think she's getting the lay of the land. Then a mysterious corpse leads to more questions than answers, and a late-night traffic stop goes very wrong. The fallout leaves Maureen contending with troubled friends, fraying loyalties, cop-hating enemies old and new, and an elusive, spectral, and murderous new nemesis--and all the while navigating the twists and turns of a city and a police department infected with dysfunction and corruption"--Amazon.com.