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Investigators, working alone or in teams, identify the charges or issues involved and evaluate all the
available information concerning each case. Based on this evaluation, they plan the preliminary direction,
scope, and timing of the investigation. In conducting their probes, investigators obtain data and evidence
in a number of ways. They interview, observe, and interrogate suspects and witnesses who are parties in
a case. They cultivate and make use of informants to obtain leads to relevant information. Investigators
examine various types of legal records and immigration documents to see if they are genuine and to
uncover evidence of fraud, conspiracy, or other immigration law violations. These examinations may also
serve to confirm the accuracy of information and evidence gathered from other sources. Quite often,
traditional methods of investigation are not sufficient to obtain hard facts and evidence about the
deliberate illegal activities of persons or groups who break immigration and nationality laws. In such
cases, Criminal Investigators may assume other identities and work undercover. This is an often risky and
demanding activity that involves long and irregular hours as well as close association with criminal
elements. Undercover activities, however, have their positive side and can be a satisfying experience,
particularly when evidence is uncovered that builds or breaks a case.
Surveillance activities, an important part of this work, are carried on in different ways such as on foot,
in vehicles, or on stakeouts and include use of electronic methods. Information gathered during the course
of an investigation is analyzed and distributed within INS to aid in planning and to avoid duplicate effort.
In cases in which evidence is uncovered about illegal actions in the jurisdiction of other agencies, Criminal
Investigators relay this information and may coordinate their activities with the agency in question. When
INS Criminal Investigators decide that sufficient evidence has been gathered to justify action, they are
authorized to seize, arrest, and take suspects into custody and to seize evidence using court-obtained
warrants where required. Investigators may carry out these actions alone, in teams, or as part of a large
group. Criminal Investigators are skilled in the methods of self-defense as well as in the use of firearms,
and they use these skills as required.
Investigators write comprehensive reports of each case for which they are responsible. Reports consist
of evidence, statements of witnesses and suspects, and all other relevant data that can be used during
administrative or criminal proceedings. Investigators may assist INS attorneys in the preparation of cases
and may be called upon to testify in court.
Working Conditions
INS Criminal Investigator positions are located throughout the United States. The larger field offices are
usually in metropolitan areas. The work may involve irregular hours, travel, and overtime as part of
normal duties. Certain parts of this job involve hazardous duty, working under stress, and the possibility
of physical harm. Benefits available include paid vacation, sick leave, and holidays; overtime pay; low-
cost medical and life insurance; financial protection in the event of death or injury; and a retirement
annuity. Criminal Investigators with 20 years of federal law enforcement service are eligible for
retirement at age 50. Retirement is mandatory at age 55.
Promotion Opportunities
Initial appointments are at grade GS-5. Career progression to grades GS-7, GS-9, and journeyman
GS-11 generally follows at one-year intervals. Thereafter, promotions are made through the competitive
procedures of the Federal Merit Promotion System. Investigators who demonstrate the skills required to
perform complex assignments may compete for supervisory or other high-level positions.
