Red Rain by Patrick J. O'Brian
Approx. 119,290 words.
Published on November 17, 2010 by
A serial killer chooses victims across the state of New York from all walks of life, prompting state police investigator Terry Levine to head up a task force devoted to finding the man responsible for stabbing or shooting seemingly innocent people. Acting more like a vigilante, the Sin Killer leaves police a clue with each victim, written in the victim’s own blood.