For this discussion, analyze the role of accounting information systems in preventing fraud within organizations. Discuss the various control mechanisms and security features embedded in computerized accounting systems that mitigate the risk of fraudulent activities. Analyze how these systems help in detecting irregular transactions, unauthorized access, and data manipulations. Additionally, evaluate the ethical and legal implications of financial fraud. To enrich your analysis, include a reference list citing scholarly articles or reputable sources that discuss real-life cases of financial fraud and the use of accounting information systems to prevent such activities.