I have a 6 year-old daughter with autism spectrum disorder, she is non verbal and has become increasingly aggressive anf prone to outbursts. what recourse is there for us?

Get help: Find a speech & language therapist who can help you create a way for the kid to communicate. It is amazing how much better these kids feel & function when they can express their needs and get them met. You may need to consult with a therapist /family counselor to learn some skills to deal with the frustration. These kids certainly don't come with a users manual.