Justin Shults, an American who hadn't been heard from since Tuesday's terror attacks in Belgium, is dead, his brother said Saturday.
"We found out today that cowards took my brother's life," Levi Sutton wrote on Twitter.
Shults, 30, was with his wife, Stephanie, waving goodbye to her mom at the Brussels airport when the explosions went off. His employer, Clarcor, confirmed in a statement that Shults was killed and Stephanie remains unaccounted for.
The couple moved to the Belgian capital in 2014. Justin, originally from Gatlinburg, Tennessee, and Stephanie, from Lexington, Kentucky, were both accountants.
Sutton said Saturday that Shults was "smart and kind and generous" and worked hard to achieve his dreams.
"He traveled the world leaving each destination better than when he arrived. Knowing that I'll never be able to see him again hurts, but it's worse that my future children will never get to know their uncle Justin as he would've been a tremendous role model," he wrote.
Clarcor, a filtration company that Shults worked for, said in a statement on its website that he would be remembered as an "intelligent, kind and loyal friend and employee."
"We do not have news yet about Justin's wife, Stephanie, and ask that you keep her and her family in your prayers," it added.