I really really really want to see this movie. It stars Angelina Jolie as a single mother who's little boy is kidnapped. The police find a runaway boy who claims to be the woman's missing child, but isn't; and they force her to take him home. When she protests, they lock her up in an asylum to silence her and hide the truth about how the police let her down.
It's based on a true story, too; read all about it here: Behind 'Changeling,' A Tale Too Strange For Fiction : NPR