Who shot bin Laden? Former SEALs fill in the blanks

He is the unknown shooter. The nameless, faceless triggerman who put a bullet in the head of the world’s most notorious terrorist.

Yet there are clues, and the beginnings of a portrait can be pieced together from scraps gleaned from U.S. officials. A trio of former Navy SEALs — Eric Greitens, Richard Marcinko and Stew Smith — helped us fill in the blanks, drawing from their experiences to develop a kind of composite sketch of an elusive historic figure in real time.

He’s likely between the ages of 26 and 33, says Marcinko, founder of the elite “SEALs Team 6” — now known as DEVGRU — that many believe led the assault on bin Laden’s compound in Abbottabad, Pakistan. He’ll be old enough to have had time to hurdle the extra training tests required to join the elite counter-terrorism unit, yet young enough to withstand the body-punishing rigors 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. A “positive thinker” who “gets in trouble when he’s not challenged,” Marcinko suspects, a man who “flunked vacation and flunked relaxing.”

He was probably a high school or college athlete, Smith says, a physical specimen who combines strength, speed and agility. “They call themselves ‘tactical athletes,’ ” says Smith, who works with many prospective 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 tummy.”

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 studs who couldn’t hack it; those who survived were most often men in good shape, but they also had a willingness to subsume 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 urchin,” Marcinko supposes. “You don’t want to stick out.” Marcinko calls it “modified grooming standards.”

His hands will be calloused, Smith says, or just plain “gnarled,” 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 run afoul of grenades, improvised explosive devices or bullets.