Let me tell you how stupid these parents are, beyond the obvious. (spoilers)
This girl just says "I pushed her." And at one point, she tells her dad, "I pushed her because of you."
That's it? Neither parent is smart enough to ask why? The mother was a effing lawyer. Familiar with law. It's her job to get the story, yet she never bothers to ask of any details that led to her daughter killing another girl. What an insult that someone would write/direct such rubbish and expect viewers to not question such stupidity.