I'm going to cut my sister off because of her decisions as an attorney
What's wrong with her being an attorney?
She is representing the wrong people.
Isn't that what an attorney does, though? They provide defense for paying clients, regardless of personal bias.
Not this time, she is going to jail.
Why is she going to jail? Attorneys serve an important role in the justice system, which is why they defend their client(s) even if they don't like said client(s). You should support your sister for working a hard job, especially if she herself is in legal trouble.