ISO, the International Organization for Standardization, is an independent, non-governmental organization, the members of which are the standards organizations of the 162 member countries.
A respondent is someone who answers to a case in court. This term is commonly used in the civil sense, with a person in a similar position in a criminal case being termed the defendant.
In the example above, once the phone call was placed to the police, you became a complainant. A complainant is someone who files a report of criminal wrongdoing with the police. The complaint can be supported by oath or in writing, and will detail the facts that led to the complaint.