How do you become one?

You qualify at the GL-7 level if you possess one year of specialized experiences of performing duties such as:

Training in criminal or civil investigative principals and techniques; applying laws and rules associated with criminal or civil procedures, searches, seizures, arrests, and rules of evidence; and/or preparing investigative reports using clear and proper written language.

You qualify at the GL-9 level if you possess one year of specialized experience preforming duties such as:

Observing and participating in various phase of investigations; researching and analyzing records, data, and other material related to investigative cases; interviewing individuals to verify facts and obtain specific information; obtaining signed statements, affidavits and documentary evidence to be included in reports or case records; interviewing witnesses and others, both informally and formally in recorded setting; and/or, searching and analyzing various forms of records.