Spoilers for s2 finale.
She was special. Every day he knew her. Until the end. She was the best. She didn't deserve to die the way she did. No one deserves to die like that.
Even as each new moment passes him by, he can see her in his mind, smiling and happy that she saved Gibbs, and then suddenly gone, her expression frozen on her face and a bullet through her forehead.
It shouldn't have happened. Ari, that bastard, should have been captured long before it got to that point. They should have worked harder. They should have done more.
But they didn't.
She was special, not just through the time that he knew her, but for every second she breathed air. She was special. His only wish was that he had told that to her. Just once.