This legal writing is entitled “The Process of Investigation towards the
Underage Who Conduct Larceny”. The background of this research was various
kinds of crime happened in society currently is not conducted by the adults,
however it is often heard that there has been criminal action of which is conducted
by the underage. Nowadays there was often faced any underage who aberrantly
behave. It is caused by the change of life style and pattern of some people in
society. Based on aforementioned background, the author conducted normative
research, i.e. a research of which study the valid norms. The data sources used in
this research were primary and secondary legal research. Primary legal source
includes regulations relating to this legal writing. Secondary legal source was
gained from literatures, result of research, and relating paperwork. The primary
data was gained from interview to the source person. The gained data was then
analyzed by qualitative analysis method, of which is processed and compiled
systematically. The conclusion was drawn by deductive reasoning method. From
the result of this research, the author gains conclusion the police gives particular
treatment in conducting investigation towards the children who conduct criminal
action of larceny. Meanwhile the barriers in conducting investigation towards the
children as the perpetrator of larceny faced by Police Force of Indonesia are
internal and external barriers. Internal barrier is unwillingness of underage to
confess their action. Meanwhile external barrier is incognizant of parent towards
their children who conduct criminal action of larceny.