Captain 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.
When Terry takes his phone out to text his wife after Gina and Charles digitise his files for him, the screen on his phone isn't even turned on.
While joking with Jake about only dating criminals, Amy says that if you break up with them, you can "send them to jail forever." Jail is where people are held awaiting trial, or in some cases serving short sentences (typically less than one year). Longer sentences are served in prison, not jail.