I don't have the specific salary data for an FBI supervisor at the moment. However, salaries for similar roles in law enforcement usually range based on experience, location, and specific job responsibilities.
Generally, supervisory roles in federal agencies like the FBI can earn from $80K to over $120K, depending on various factors such as tenure and grade level. For the most accurate information, I recommend checking Glassdoor or similar platforms for updated salary insights specifically for FBI supervisors.