White Bizango — Stephen Gallagher

Rescued from the morgue and a bizarre and unpleasant end, Louisiana detective John Lafcadio owes his life to the Cult Crime Co-ordinators. Known also as the Voodoo Cops, their job is to dispel superstition and nail crimes of ignorance.
There's a growing need for their services. A new kind of predator is on the loose. When the middle classes began to adopt vodoun as a lifestyle fad, their doors were opened to a ruthless white male with a command of the religion's darker practical secrets.
Hunting down Lafcadio's would-be killer will be no easy task. His victims are also his protectors. And how can Lafcadio hope to identify a man whose eyes he once stared into, but whose face he can't remember?