Jake questions the witness about what happened immediately before the line up. In reality they would have already taken her testimony. Line ups are also not conducted by the detective who is working the case so as to avoid the possibility that the detective will, consciously or subconsciously, influence the witnesses identification.
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.
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.
Terry spends more than 18 hours on the couch in the supply closet without going to the bathroom.
When Gina is talking to Rosa while she's looking at a dating app, the chess board on the table is set up incorrectly. It is clearly meant to be in the starting position but the queens and kings are inverted.
Kate claims to have slapped a stewardess with her fist, and yet she is taken to the waiting Jake and Amy and released without processing in time for a restaurant visit. Any assault of cabin crew, and more so since 2011, is a felony which would not end up in the simple release of the rowdy passenger to the waiting family members by NY Port Authority Police.
Rosa complains about a past date, saying the guy rides a Yamaha and compares it to a station wagon, when she owns a Yamaha R1 herself.