What was Justyce doing when a cop came and put him in handcuffs?

This question is referring to the story ''Dear Martin'' written by Nick Stone. The main character of the story is a high school African-American teen Justyce McAllister. The story is following his problems.

In the story, we have situation when a white police officer comes and put handcuffs on Justyce. Justyce was thrown on the ground and he knows that he is not guilty. In those moments, he was dealing with his problems of because he was living in one old neighborhood and other students were not considered him as equal to them. He was left injured with his own thoughts.