How did stereotypes play a role again during the conversation between Quinn and English in the weight room?

When Quinn and English workout, he talks to English about Rashad, and he asks English if he knows who made the tag. English won't answer him. Then Quinn tries to explain that Guzzo is upset because the tag alludes to his brother's guilt, and he makes up excuses...... he even claims that Rashad might have been on drugs. Be this time, English is angry, and he stands up for Rashad..... telling Quinn that he can go on pretending nothing happened because he's white. He, on the other hand, cannot.

Did Quinn mention anything about no one being guilty if Paul had been doing his job?