MINNEAPOLIS (WCCO) — Since the passage of the medical marijuana bill in Minnesota, patients across the state have been helped.

Joy Mitchell says her 16-year-old son Josh went from being violent and often pulled from school to being able to control himself.

But the law is still holding the Crosby teenager back. Even a few months ago, a quiet concentrated game of chess would have been out of the question for Josh Mitchell.

The 16-year-old has autism and was diagnosed with Tourette syndrome.

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Jennifer Mayerle ~ Minnesota.CBSLocal.com ~