Who is the poacher in Big Game by Stuart Gibbs?

In "Big Game" by Stuart Gibbs, the poacher is revealed to be the character named Keaton. He is involved in illegal activities related to the hunting of endangered animals in the African savanna where the story takes place. The protagonist, a young boy named Teddy, uncovers his identity as he navigates through the challenges of the plot. The story highlights themes of wildlife conservation and the fight against poaching.