Fan Casting Dead Fall

In war-ravaged Ukraine, a Russian military unit has gone rogue. Its members, conscripted from the worst prisons & mental asylums across Russia, are the most criminally violent combatants to ever set foot upon a battlefield. As they move from village to village, committing horrific war crimes, they meet little resistance as all able-bodied men are off fighting the war. When American aid workers are killed, Scot Harvavth is sent to settle the score. Will Harvath be able to find the men in question & will he be able to stop them before they can kill again?