Brennan aids FBI Special Agent Booth in his investigations involving human remains that cannot be identified without Brennan's skills in forensic anthropology. In contrast to the other main characters, Booth has limited knowledge of science and is often used to provide a layman's translation of the scientific jargon-filled dialogue. He also provides the dichotomy between science and emotion, as in one episode when Bones comments to Cam, "He (Booth) can read people like you read lab charts or I read bones." Booth is known for his ability to guess people's motives or "posit a scenario," something that is a constant frustration and struggle to Brennan. He is a former US Army Rangers sniper with at least 49 confirmed kills, and has an intense dislike of clowns.