In and Out - S7-E14
Visible crew/equipment: While Danny and Baez are hiding in the hall, when Ramirez (parole officer) knocks on Lloyd 's door he gets the gun from under the seat cushion, then as Lloyd starts to walk to the door, the green T-mark is visible on the floor near the right side of the screen. (00:34:20)
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.