A St. Louis County, Missouri, woman says she has been charged with trespassing after responding to a call from her son's school to help calm the boy down. Niakea Williams says a teacher at Walnut Groves Elementary School called and said her son, who has Asperger's syndrome, was panicking. She rushed to the school, was buzzed in and went to her son's classroom. While she was consoling him, the principal came in to tell her she'd violated school policy by not signing in. She offered to sign in, but the principal said he'd already called the police. Williams said cops hauled her out of the school in handcuffs.