Exterior shot of the ambulance (siren off, now, for no reason), sharply swerving around a corner. Trick-or-treating kids standing on the corner of Crackhead and Carjack give an outraged "Wow!" and "Hey!" Even kids in L.A. have no respect for ambulances.
Teresa decides to wrap the brother up in gauze. It's totally what I would have done with one of my dolls when I was a kid and my dolly was "sick." I can't tell what good it's doing, but she wraps him up tight. Now, if the collapsed lung was adding pressure to the heart, blocking it from getting enough blood, why would you add pressure to the chest -- pressure on the bullet trapped inside the chest -- by mummifying the torso? I'm no doctor, but what the hell? And how is Teresa so easily getting the gauze to go under the body so she can wrap him up? She's not even wrapping him tightly, though, just over and under, around his shoulders like a shawl.
Through the front window, Teresa sees that they're driving down a dark neighborhood street. They make a left into a gated driveway. McNotahey stops the car, looks back towards Teresa (I guess Teresa's point of view is also sometimes McNotahey's point of view), and then leaves the car, leaving Teresa totally alone in the truck with the unlocked doors she doesn't bother trying to run out of. Instead, she looks through the window and watches McNotahey unlock the gate. Suddenly, the brother starts panting and heaving, trapped under the weight of his half-hearted gauze prison. Teresa releases the air-pressure gauge of some tube that does something doctorly, and the kid totally just dies right there as the Ode to Herbie Hancock plays in the background. Teresa, panicking, starts cutting the gauze off. McNotahey's suddenly right there in the window -- the one that sometimes has glass and sometimes doesn't -- and asks what's going on. Teresa says she just has to change his dressing. The ambulance rolls on as Teresa starts giving the brother's chest quiet compressions. Blood gushes everywhere and Teresa makes an upset face. She piles a bunch of gauze on top of his chest as her view slows down to slow motion. Holy crap. We watch Teresa slowly get nervous as we hear her sadly in a voice-over: "Mama. I want to pledge to you that for the rest of my life -- Mama, I want to pledge to you that for the rest of my life that I'm gonna do whatever it takes to save people's lives, okay?" We see a very faint, sad Teresa making this pledge on the right-half of the screen. Crap! We hear a woman say, very serenely, "My angel." Teresa panics over the dead brother.