Murder in the Cemetery

The twins are on the hunt for ghosts again, and trouble follows. Tripping into an open grave, they discover a dead man covered in fresh blood.
They race to find Hawk Theriot, the only federal ranger in the vast Atchafalaya Basin. Hawk tracks the murderer through clues left at the scene. Meanwhile, the murderer breaks into Hawk's camp in search of the twins, putting Kristi's life in jeopardy.
With time running out, can Hawk piece together the clues and find the killer before more lives are lost?