Forensic Auditing

Forensic accounting is the specialty practice area of accountancy that describes engagements that result from actual or anticipated disputes or litigation. "Forensic" means "suitable for use in a court of law", and it is to that standard and potential outcome that forensic accountants generally have to work. Forensic accountants, also referred to as forensic auditors or investigative auditors, often have to give expert evidence at the eventual trial. All of the larger accounting firms, as well as many medium-sized and boutique firms, have specialist forensic accounting departments. Within these groups, there may be further sub-specializations, some forensic accountants may, for example, just specialize in insurance claims, personal injury claims, fraud, construction, or royalty audits.
Forensic accountants utilize an understanding of business information and financial reporting systems, accounting and auditing standards and procedures, evidence gathering and investigative techniques, and litigation processes and procedures to perform their work. Forensic accountants are also increasingly playing more proactive risk reduction roles by designing and performing extended procedures as part of the statutory audit, acting as advisers to audit committees, fraud deterrence engagements, and assisting in investment analyst research.
I think that Forensic accounting is a very interesting and unique subject that is worthy of studying.
http://en.wikipedia.org/wiki/Forensic_accounting