Amy states in the discriminatory behavior class that there are 20 protected classes. There are only 12 protected classes in New York: race, creed, color, national origin, sexual orientation, military status, sex, age, marital status, domestic violence victim status, disability, pregnancy-related condition, predisposing genetic characteristics, prior arrest or conviction record, familial status, and gender identity. Federally, there are only 10 protected classes: race, age, color, religion/faith, sex, national origin or ancestry, disability, genetic information, citizenship, and veteran status.
Santiago is wearing 2 citation bars that are not issued by the NYPD. Also, NYPD regulations require that the American Flag bar be worn as the highest citation bar - something Santiago would have known.
Holt wears his Commendation breast bar above his World Trade Center Breast Bar. When the WTC bar is worn, it is worn above all other medals, but below the American Flag bar.
The nurse at the hospital tells Jake and Charles that the bullet went through Pimento's shoulder, however, when he arrived at the precinct, there was no exit wound on his back.