An inhouse investigative function facilitates deterrence, efficiency, and recovery of losses and is helpful in combatting internal and external criminal activity and dealing with noncriminal matters such as policy violations. Options for such a capability include developing a full-time position within the security department, training a staff member to fulfill the function on an as-needed basis, using the services of a private investigator or contract firm, or hiring an investigator in conjunction with other companies. A successful investigation requires speedy reporting, review and evaluation of reports, coordination among concerned personnel, verification of loss or incident, and data collection, including interviewing. In conducting the investigation, such pitfalls as entrapment, defamation, assault, invasion of privacy, and malicious prosecution are to be avoided. Once an admission of wrongdoing is gained, the decision to involve police should be based on the amount of the loss, the strength of the evidence, the likely veracity of the suspect, or an admission of guilt. The investigator should be prepared to support the case as it progresses through the court system.