This is a documentary about how the District Attorney will play the system to defeat anyone they come up against regardless of whether they're innocent or guilty...they only want to win and Dan Goldstein is a prime example of this. Just look at how he's aged and riddled with the disgusting things he has said and done to people. He cannot conceive that everyone is different, he simply worked to box Sally up as a violent woman, he used drug addicts/pedlars to provide witness testimony and he basically worked on the notion that mental health issues do not exist especially when you're battered.
The guy literally shows how he celebrated this as a victory when he took her life. It's pretty inconceivable that this battered woman was planned a murder, called 911 and had herself locked up, away from her children and basically lose her own life to take one...there's zero sense in that, zero.
It shows how fraudulent the "justice" system in the US is.