Portrait of a Spy

in London’s Stockwell tube station after being mistaken for a wanted Islamic militant. British prosecutors declined to bring charges against the officers involved in the killing, a decision that provoked outrage among human rights activists and civil libertarians around the world. Gabriel knew that, under similar circumstances, he could expect no such leniency. It meant he would have to be certain before acting. He was confident of one thing. He believed the bomber, like a painter, would sign his name before pressing his detonator switch. He would want his victims to know that their imminent deaths were not without purpose, that they were being sacrificed in the name of the sacred jihad and in the name of Allah.
    For the moment, though, Gabriel had no choice but to follow the man and wait. Slowly, carefully, he closed the gap, making small adjustments in his own course to maintain an unobstructed firing lane. His eyes were focused on the lower portion of the man’s skull. A few centimeters beneath it was the brain stem, essential for controlling the motor and sensory systems of the rest of the body. Destroy the brain stem with several rounds of ammunition, and the bomber would lack the means to press his detonator button. Miss the brain stem, and it was possible the martyr could carry out his mission with a dying twitch. Gabriel was one of the few men in the world who had actually killed a terrorist before he could carry out his attack. He knew the difference between success and failure would come down to a fraction of a second. Success meant only one would die. Failure would result in the deaths of scores of innocent people, perhaps even Gabriel himself.
    The dead man passed through the doorway leading to the piazza. It was far more crowded now. A cellist was playing a suite by Bach. A Jimi Hendrix impersonator was grappling with an amplified electric guitar. A well-dressed man standing atop a wooden crate was shouting something about God and the Iraq War. The dead man headed directly toward the center of the square, where the comedian’s performance had sunk to new depths of depravity, much to the delight of the large crowd of spectators. Using techniques learned in his youth, Gabriel mentally silenced the noises around him one by one, starting with the faint strains of the Bach suite and ending with the uproarious laughter of the crowd. Then he glanced one last time at his wristwatch and waited for the dead man to sign his name.
    It was 2:36. The dead man had reached the outer edge of the large crowd. He paused for a few seconds, as if searching for a weak point to make his entry, then shouldered his way between two startled women. Gabriel entered at a different spot several yards to the man’s right, slipping virtually unnoticed through a family of American tourists. The crowd was four-deep in most places and tightly packed, which presented Gabriel with yet another dilemma. The ideal ammunition for a situation like this was a hollow-point round, which would inflict greater tissue damage on the target and substantially reduce the risk of collateral casualties due to over-penetration. But Gabriel’s Beretta pistol was loaded with ordinary 9mm Parabellum rounds. As a result, he would have to position himself to fire at an extreme downward trajectory. Otherwise, there was a high probability he might inadvertently take innocent life in an attempt to save it.
    The dead man had breached the inner wall of the crowd and was now headed directly toward the street comedian. The eyes had taken on the glassy thousand-yard stare. The lips were moving. Final prayers . . . The street comedian wrongly assumed the dead man wished to take part in the performance. Smiling, he took two steps toward him but froze when he saw the hands emerge from the pockets of the overcoat. The left was slightly open. The right was bunched into a fist, with the thumb cocked at a right angle. Still, Gabriel hesitated. What if there was no detonator? What if it was a pen or a cylinder of lip balm? He had to be sure. Tell me your intentions , he thought. Sign your name .
    The dead man turned to face the market. The patrons looking down from the balcony of the Punch and Judy laughed nervously, as did a few of the spectators gathered in the piazza. In his mind, Gabriel silenced the laughter and froze the image. The scene appeared to him as though painted by the hand of Canaletto. The figures were stock-still; only Gabriel, the restorer, was free to