Hondo and his chief are walking in SWAT's corridors. The chief says he's got to go to City Hall to speak with the mayor. Then, Hondo goes to the tech room where Deacon is. They put on the television while the conference at City Hall is on the air. We see then the chief of police standing on the crowd. However, no more than 5 minutes were in between.
The character Chris is chasing a suspect down the stairwell, explosions had gone off, the guy was carrying an object that had red lights. Yet she jumps down the flight of stairs instead of taking a shot. The rules of engagement in that situation, is that you can shoot a suspect, either to wound or to kill. When the risk to life or indeed in some circumstances to property is high, and the level of suspicion is high that more lives or damage might happen, you have the green light to go for the kill and no court in the land will convict you, as it will be classed as a lawful killing.