After the visit to the shooting range, Reacher adds Cash's information to the case evidence. Helen and Rosemary sift through the clues in a riveting analysis and finally get Reacher to conclude that Barr is innocent, which means someone set up Barr as the sniper. Someone is also trying to get Reacher off the case, which formerly seemed a slam-dunk, but is now falling apart. Reacher is teamed with Helen, working against a prosecution team that has an explosive secret of its own. Reacher gets closer to the unseen enemy pulling the strings, leading him to the real perpetrators, a Russian gang masquerading as legitimate businessmen. The gang's 80-year-old capo spent much of his life in one of the infamous Soviet gulags and is known only as the "Zec" (prisoner). Reacher outwits the mob guards in the Russian gang's fortress, efficiently and brutally dispatching five hoods before confronting the boss and forcing him to come clean on the conspiracy from beginning to end: covering up the murder of the one victim he wants dead with the other four victims. The real killer is shot, the Zec chooses to confess to the authorities who arrive on the scene, Barr goes free, and Reacher moves on.