“All complaints will be swiftly and thoroughly investigated.” No doubt this sentence, or something similar, appears in your company’s employee handbook. Unfortunately, there will likely be a time when you’ll have to put those words into action. Whether an employee alleges discrimination or harassment, or reports a coworker for theft or fraud, you’ll need to handle investigating employee complaints appropriately. Keep these five best practices in mind to avoid unnecessary legal complications: (1) Maintain confidentiality Take every precaution to keep details of the allegation private — especially the identities of the accused and the accuser. Remind managers that they need to have all conversations behind closed doors, store all meeting notes securely and speak only to those people who are necessary to the investigation. Assure workers involved in...