Governmental agencies at the state, federal, and local levels employ governmental accountants. Habitually the duties of these accountants relate to tax revenues and expenditures. For instance Internal Revenue Service employees use their accounting backgrounds in reviewing tax returns and investigating tax fraud. Government agencies that control business activity such like a state public service commission that regulates public utilities e.g. Telephone Company, electric company generally employ governmental accountants. These agencies often utilize governmental accountants who can review and evaluate the utilities' financial statements and rate increase requests. As well FBI agents trained as accountants find their accounting backgrounds useful in investigating criminals involved in illegal business activities such like drugs or gambling.