He's out there somewhere, an instant icon in the records of American conflict, the final big-game hunter. But a puzzle, too, his identity would be kept a secret for now, and maybe forever. He is the unknown shooter. The nameless, faceless triggerman who put a bullet in the head of the world's most notorious terrorist, Bin Laden. He's likely between the ages of 26 and 33, says Marcinko, founder of the "SEALs Team 6" that many believe led the attack on Bin Laden in Abbottabad, Pakistan. He'll be old enough to have had time to hurdle the extra training tests required to join the counter-terrorism unit, yet young enough to stand the body-punishing harshness of the job. The shooter's a man, it's safe to say, because there are no women in the SEALs. And there's a good chance he's white, though the SEALs have stepped up efforts to increase the number of minorities in their ranks, Marcinko and Smith say. He was probably a high school or college athlete, Smith says, a physical specimen who combines strength, speed and wisdom. "They call themselves 'tactical athletes,'" says Smith, who works with many future SEALs in his Heroes of Tomorrow training program in Severna Park. "It's getting very scientific." Marcinko puts it in more conventional terms: "He'll be ripped," says the author of the best-selling autobiography "Rogue Warrior.""He's got a lot of upper-body strength. Long arms. Thin waist. Flat stomach." On this point, Greitens departs a bit. "You can't make a lot of physical assumptions," says the author of "The Heart and the Fist: The Education of a Humanitarian, the Making of a Navy SEAL." There are SEALs who are 5 feet 4 and SEALs who are 6 feet 5, Greitens says. In his training group, he adds, there were college football boys who couldn't hack it; those who survived were most often men in good shape, but they also had a willingness to show their concerns in favor of the mission. The shooter's probably not the crew-cut , neatly shaven ideal we've come to expect from American fighting forces. "He's bearded, rough-looking, like a street naughty boy," Marcinko supposes. "You don't want to stick out." Marcinko calls it "modified grooming standards." His hands will be calloused , Smith says, or just rough enough," as Marcinko puts it. And "he's got frag in him somewhere," Marcinko says, using the battlefield shorthand for "fragments" of bullets or explosive devices. This will not have been the shooter's first adventure. Marcinko estimates that he might have made a dozen or more deployments , tours when he was likely to have dealt with quite a number of dangerous situations, getting ready any time for explosive devices or bullets. From the passage we can know that the writer   _  .
knows clearly what the shooter is like doubts whether Bin Laden is dead is certain that the shooter is a man is not sure of the shooter's gender