The image of the suspect on Jake's computer screen changes between when he freezes the footage and when he prints the picture.
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.
The squad is shown spending 48 hours straight at the precinct, even sleeping at their desks (apart from Rosa). There is a night shift who would have use of those desks overnight.