Fraud Accounting related question

You are in your first month as an internal auditor in the corporate offices of Cover-Up Fraud-Mart, a large regional variety store chain based in Los Angeles. Your manager has just given you a general overview of the companys problems with fraud. In fact, losses from fraud exceed losses from shoplifting by tenfold, and management wants your perspective on what it can do to proactively detect fraud. From your fraud audit- ing class, you know that the data-driven approach is one of the most effective detection methods.

What techniques should be run in Steps 4 and 5? Make sure answer is full of detail.