A witness with Asperger's refuses to testify against her friend, frustrating Mary. Elsewhere, Marshall and Stan try to prevent the deportation of a key witness, and Brandi comes clean about her investment plan with Scott.

Mary keeps an eye on a teen witness whose separated parents are too distracted by their own issues to pay attention to their daughter. Elsewhere, Marshall thinks a witness may have betrayed his brother; and Brandi tends to Scott after he's attacked.