IMHO, apathy about anyone who's ensnared in the legal system, "Well, if they weren't doing anything wrong...", leads to dehumanisation. Dehumanisation will - almost always - lead to many forms of abuse.
I wish it were as simple as just making privatisation illegal and reforming the plea system but I fear that it would take far more than that to see true change.
Put succinctly: The moment you no longer care about someone's life, in any shape or form, then that battle was already lost before it was even begun.