Atlas doesn't even try to resist arrest, which Salem supposes makes sense. After all, they are in a basement with only one exit. They're surrounded, with no hope of escape.
Salem does his best to comply as well, when the cops finally burst through the door, and the next few minutes are a blur as he's lost in his thoughts. What a coincidence, the police showing up at the same time he's here. Salem processes himself being put in handcuffs as he's escorted out of the building. That alone annoys him, but then he spots Jordan.
Salem breaks away from the officer with ease, who clearly knows who he is considering she hardly tries to stop him. Salem spots Atlas being escorted to a car close by from the corner of his vision, and he vaguely registers some surprise at how compliant Atlas is being, before he reaches the officer.
Jordan spots him, and when he's not even surprised to see Salem, something clicks.