Buck is a middle-aged security cheif and a frenemy of J.J.
He killed Henry when he didn't produced the emeralds that were inside of him. When Teddy told his mom about the murder, Buck spied on Teddy. He also released the mamba and set the tigers on Teddy, J.J., Summer, and Mrs. Fitzroy. Buck arrested teddy's parents and confessed at the end of the book. He tried to run away however Large Marge stopped him and Buck was jailed for life. He also released the Fitzroys.