![Blue Bloods mistake picture](/images/screenshots/306000-306999/306966_sm.jpg)
Visible crew/equipment: When Danny and Baez are at the scene of the firebombing while it's raining, in the second shot as they walk toward the eleven body bags, three nylon T-markers (yellow, red, and green) are visible on the wet ground where Baez, Danny, and Molina will be standing in the following shots. (00:02:45)
Answer: It's a common cop show plot device. If the police on the show always acted in the most logical way (i.e. not alerting a suspect to their presence) the show wouldn't have the opportunity for an exciting foot chase.