About the Sanction #4 (Mature) (Of 5)

Detectives Dimitrovich and Smirnoff have caught up to the serial murderer they've been hunting, and it leads to a brutal battle. But finding the culprit only leads to more trouble - and more attempts on their lives. After realizing someone else is pulling the killer's strings, Dimitrovich and Smirnoff face an even deadlier threat