They do have flashbacks of Christian's childhood in the movie (spoilers)
I was just on Instagram and found a short video someone took at the very beginning of the movie (before the credits). It shown back and forth of Christian as a little boy hiding and his mother's pimp finding him as he twitches and moves around while he's asleep in bed. I was wondering if they would show flashbacks and although the volume didn't work on the video it was still heartbreaking.
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