To become an FBI agent, applicants must have a bachelor's degree, 3 years of experience as an investigator, be between 23-36 years old, and pass a written exam, polygraph test, physical exam, and background investigation. FBI agents investigate crimes like car theft, kidnapping, and bank robberies, as well as threats to US security like espionage, terrorism, and sabotage. The job requires being on call 24/7 and working over 40 hours per week with potential for travel nationwide. Salaries in Wisconsin range from $46,030 to $81,340 annually or $22.13 to $39.11 hourly, while national salaries range from $36,500 to $97,870