Which of the following should a private investigator do after completing an investigation?

The choice to file all evidence and documentation after completing an investigation is crucial for several reasons. It ensures that all findings are organized and preserved for future reference. Proper documentation can be important if any legal issues arise or if the client needs to refer back to the findings at a later date. This practice also aids in maintaining a clear record of the investigative process and results, which is an essential part of a private investigator's responsibilities.

Moreover, maintaining comprehensive records adheres to professional standards and ethical practices within the industry. It protects both the investigator and the client by providing a transparent account of the investigation, which can be invaluable if there are any disputes or requirements for additional investigations in the future. Ensuring that evidence is securely filed is a means of safeguarding the integrity of the investigation and maintaining professional credibility.