Blood Web by Gary Starta

FBI Special Agent Caitlin Diggs faces a paranormal killer when a crystal takes over a teen and leads her on a chase across the country. Empowering the teen with supernatural abilities, the crystal exacts revenge on descendants of soldiers responsible for the Sand Creek Massacre but it also has a taste for neurotransmitter serotonin which it needs from humans to continue its consciousness.

Publisher Description

Agent Diggs is the only FBI agent in the bureau to consider extreme possibilities and surmises the teen has a means to track his victims via DNA.

A heart pounding cat and mouse game ensues as Diggs attempts to fool the teen she is his next victim but as she plays with fire, a former military man begins to see the crystal as the perfect ingredient for a mind control weapon. Because the crystal possesses sentience it can counter Diggs’ plan for its demise and possibly exert mind control over her as well.

Can Diggs stop this biological internet from taking more victims, becoming a tool for mass mind control and resist the lure of its blood web?