Edge of Darkness: Episode Four "Back From The Dead" (Paranormal Investigations Unlimited, #4)

Riddle me this voodoo clue…
An unearthly hue.

Logan Malone decides they have to start back at the beginning, so he and Presley Kincaid go visit Carson Del Vecchio's mother. They believe something is tying his ghost to this world and maybe she kept a bit of hair from when he was a baby. That turns out to be a dead end but they do learn Del Vecchio has a half-brother whom Logan wants to question later.

Frustrated, Logan takes Presley to a supernatural nightclub to talk with an old voodoo priest,...