What type of report must Private Detectives provide at the end of an investigation?

Private detectives are required to provide a detailed investigative report at the end of an investigation as it serves multiple crucial functions. First and foremost, this report documents all findings, evidence gathered, and conclusions drawn during the investigation. It details the methodologies used, the sources consulted, and any relevant timelines, which are essential for understanding the case comprehensively.

Additionally, a detailed investigative report ensures accountability and professionalism. It can be critical in legal contexts, as the report may be used to support claims or defenses in court. This level of documentation also acts as a safeguard for both the investigator and the client, providing a clear record of what was done during the investigation and the results achieved.

While other options might imply some form of communication about the investigation's outcomes, none provide the comprehensive and formal documentation required to officially conclude the investigation, which is why the choice of a detailed investigative report is the most appropriate.