Darth Vader works in the purchasing department for Force Reawakens Inc. During the 12 years that he has worked there, he has been a trusted employee and has sole responsibility for the company's purchasing department. He started working for the company in 2003 for $30,000 per year (after graduating from the University of Florida) and now makes $100,000 per year. Fellow employees and friends have noticed that his lifestyle has improved substantially since his recent promotion to purchasing manager. For one thing, he regularly snorts cocaine on weekends with affluent friends aboard his new boat. Based on an anonymous tip, the CEO asks you, the chief internal auditor, to look into the situation. What steps would you to take to investigate the possibility of fraud? Explain in detail.