Being that my parents are African, I am dark-skinned.
One would imgine you are, yes. I think you don't need this sentence...
Africa after my parents divorced, at the age of six
or 7 . When I came back in 2005, I started middle school and was
teased and mocked about my skin tone.
In the last paragraph, I think you should probably name this school and its particular program. Go into more detail, and tel them why this school is exactly the right place for your specific philosophy and interests within the field of criminal justice. If you show that you are already very familiar with this school, and very focused, it will put you at an advantage.
That is just my idea...