Enron was an energy company that collapsed in 2001 due to an accounting scandal where they hid billions in debt and losses. Their auditor, Arthur Andersen, failed to catch the deception and shredded documents related to their audits of Enron. This destroyed public trust in the accounting industry. Key parties responsible included Enron executives who misled investors and Arthur Andersen for poor auditing and shredding documents. Regulations were violated around accounting transparency, auditor independence, and corporate governance. The scandal led to new regulations like the Sarbanes-Oxley Act and separating auditing and consulting services to restore integrity to financial reporting.