Explain the elements of Fairclough's Critical Discourse Analysis in the following case laws and how does these elements relevant during the investigation process up till when the judgement of the case is made:

1. Successful Case Law: United States v. Madoff (2009)

2. Unsuccessful Case Law: United States v. Stanford (2009)

3. Successful Case Law: United States v. Skilling (2006)

4. Unsuccessful Case Law: United States v. Scrushy (2005)

5. Successful Case Law: United States v. Rajaratnam (2011)

6. Unsuccessful Case Law: United States v. Quattrone (2004)