rlst.zipHi, Thanks for the previous answers.
I wanted to confirm with you then, analyzing the response of the WebService:
Cases /% CaseSystemId% / auditEvents
If the service returns me many occurrences of results  then it means that there is a positive match and if results come to me empty it is because there is no match so the person is not high risk.
Could you provide me with data to prove of someone who does not of results and another case that throws me many matchs in order to test every results.
I am attaching the answer to a case I have already tried.
Thank you very much.