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THENEGUY
Since: Apr, 2017
quantumquandary
Since: Jun, 2017
Cannybelle
Since: Jan, 2011

I don't remember much, but:
A boy lives with his father, something happens (an altercation between the two, pretty sure father was abusive in some way...... I think he was a drunk?) and he accidentally kills his father when he pushed him and the father bashed his head on the mantle. He doesn't know what to do, doesn't tell anyone until he befriends a new neighbor girl. When he finally admits to her what he's done, (this part I'm hazy on) I'm fairly certain she convinces him to get rid of the body. Something happens something happens and the girl and her mother end up stealing everything of value from the boy and disappearing, and it's implied they've done this before, at hints on their 'acting abilities'.
If I remember the book cover correctly (and I could be wrong on this), it was a photograph of a boy, dark hair and dark clothes, lying in the middle of a street, arms out to his sides, head turned to the side. Thanks for any help!!