A good investigative technique is to use the references provided by the candidate to acquire other references that the Candidate may not have offered. Each reference that completes a questionnaire in POBITS is asked to provide other reference and can provide as many as they want. When they do, they will automatically be adding to the "Secondary References" list in the Candidate's case file so it's possible you may acquire some secondary references with very little work on your part. But as your investigation progresses and you discover secondary references on your own, you can add them under Secondary References on the Relatives and References tab of the case file.