FBI Agent Ella Dark has studied serial killers from the time she could read, devastated by the murder of her own father, and has gained an encyclopedic knowledge of murderers. A...

Amidst the fiery landscapes of Hawaii Volcanoes National Park, National Parks Officer Peyton Risk must decode a trail of scorched earth and ash to catch a killer targeting those...

FBI Agent Ella Dark has studied serial killers from the time she could read, devastated by the murder of her own father, and has gained an encyclopedic knowledge of murderers. But...

In the harsh glare of the desert, a mastermind killer leaves victims to die of exposure in the wilderness, leaving behind chilling clues, drawings on canyon walls. National Parks...