Thank you for your reply.
The working SQL:
SELECT TBL_FINDINGS.FIN_Finding_Index, TBL_FINDINGS.FIN_Finding_Number, TBL_RESPONSE.RES_Response_Status
FROM (TBL_FINDINGS INNER JOIN (SELECT RES_Finding_Index, Max(RES_Response_Index) AS Max_Index
FROM TBL_RESPONSE
GROUP BY RES_Finding_Index )...