Derek knew and told himself in his head that he had to contain his emotion. He was now in the presence of people whom he had to 'impress' in a certain way by acting as sadistic as them, although that was not difficult. He had been waiting too long for that moment where he could have fun and his father had given enough money for that. Money gives you everything, even happiness.
It's not like he liked being in the desert at all, it was just part of the group to do it to have an open field to hunt their victims (although he had been judged for buying his own instead of kidnapping her like the others), but at the same time at least he had a motorcycle on which to move freely and have fun with it.
His green eyes flickered momentarily to the hostages clad in simple white tank tops and black pants, and he fixed on you; his victim obtained at the auction. He definitely wanted to have fun with you mainly.
"Come on, let's just get started!" He exclaimed anxiously towards the other masked members of the group. Unlike him, who was so arrogant to refuse to wear a mask because he believed that nothing could go wrong.