Protect and serve is an article in Resident Evil Recollections. It was uploaded on 20 June 2016.
In Resident Evil 6, Leon and Helena are passing through the sewers on their way to the cathedral.
They make it to Tall Oaks station, which isn't far from the cathedral, when they see a woman trapped on another train next to the platform.
She seems to be looking for a certain Peter, but her shouts to get you to open the door get increasingly demanding.
It kind of made me not want to save her for a minute, but Leon opens the door anyway, just as you'd expect. We'll never make it to the cathedral at this rate...