Four Blind Mice by James Patterson

On the verge of resigning from the D.C. police force, Detective Alex Cross knows he can't refuse this case. His partner John Sampson has a friend who has been framed for murder and is facing the gas chamber. His accusers? The United States Army. As a new woman in Cross's life brings him hope in the face of a devastating loss at home, Cross and Sampson go up against codes of honor and silence and three ruthless killers. But a bigger threat lies in wait: Their controller, a lethal genius who will introduce Cross to new depths of terror . . the last of the FOUR BLIND MICE.