Explain an employees duty to cooperate in a fraud investigation. Also, explain when an employee is entitled to legal counsel or a union representative. Cooperation: Describe an employees duty to cooperate in a fraud investigation. (provides specific and relevant details). Constitutional Rights: Explain how an employees constitutional rights (Fourth, Fifth, or Sixth Amendment) factor into his or her duty to cooperate. (includes clear examples and specific details). III. Counsel: Describe when an employee is entitled to legal counsel or a union representative.