The Night Killer Diane Fallon Forensic Investigation Series, Book 8.

Forensic investigator Diane Fallon fights for her life in her eighth mystery Diane is driving through a downpour on a windy mountain road after picking up a set of rare Indian artifacts when a tree suddenly slams across the hood of her car, revealing a human skeleton in its hollow trunk. As she starts to investigate, she's ambushed by a stranger and forced to run for her life. Stranded in the night with a killer, Diane must uncover a secret...