Another area of potential focus for your degree in criminal justice is in the area of juvenile justice. If you major in juvenile justice be prepared to take child development, as well as psychology and sociology courses as part of your curriculum.
If you want to seek a degree in the area of juvenile justice you should first obtain either a part-time job or internship working with this designated population prior to deciding both which program most interests you and if this focus is right for you.
Juvenile justice can be both rewarding and very disheartening. This is not a job where you will be able to save every child/teenager that has been wronged and, thus, has committed a crime. There are many sad realities and harsh truths that you will experience both about the system and the juveniles (and their families) themselves.