Your father, Gibbs’ brother, had sent you with your uncle, Gibbs for the summer. Your father was even more worried about you now more than ever since you’ve been little everything seems off about you. You never smiled, you never laughed you were just completely off. You had hurt many kids and never felt bad about it. So he sent you to Gibbs and Gibbs had brought you to headquarters a few times since he still has to work and lead his team. After Ducky has hung around you and seen you actions he basically begged Gibbs to let him examine you. Little did they know you have an insatiable bloodlust and you’re probably a sociopath.