SELECT
  ED.evidenceDescriptorID
INTO
  :evidenceDescriptorID 
FROM
  EvidenceDescriptor ED, 
  EvidenceChangehistory ECH 
WHERE ED.caseID = :caseID 
   AND 
  (
    ED.statusCode = :statusCode1 
    OR ED.statusCode = :statusCode2 
  ) 
  AND ED.evidenceDescriptorID =  ECH.evidenceDescriptorID