Statutory investigations where a post facto investigation takes place to identify forensic evidence that can be used in a court of law to identify culpability and cause of a fraud.
Corporate investigations generally where a company has invested in a subsidiary and has reason to believe malpractice in that subsidiary.
Insurance investigations where insurers or re insurers require evidence regarding suspicious claims.
Whistleblower complaints, where a thorough investigation is conducted on receipt of whistle blower complaint against malpractices of an employee or a vendor
Open source intelligence for suspects, these are checks available in the public domain for suspects. These are done generally in tandem with whistle blower investigations.