The biggest reason for hiring an outside company such as Strategy People Culture to perform an investigation of an employee complaint is for objectivity and neutrality. The sad truth is, internal employees who are often conducting investigations have competing interests around the results of the investigation. To get to an objective conclusion is critical. Hiring an independent company has many implications, including risk management. Ask yourself, if you had to defend your company in a court case, what do you think would have more credibility in front of a jury: a member of your company's management, a member of your company's human resources team, or an expert independent and neutral third party.