Mockingbird Don't Sing is a 2001 American independent film based on the true story of Genie, a modern-day feral child.

[1] The film is told from the point of view of Susan Curtiss (whose fictitious name is Sandra Tannen), a professor of linguistics at University of California, Los Angeles.

Katie is taken to Children's Hospital, and Louise and Wes find themselves being arrested for "what authorities are calling the worst case of child abuse they've ever seen".

One of the team members, Judy Bingham, a special education teacher, sees Katie as a pawn whom she can use to attain international fame.

University of California, Los Angeles (UCLA) graduate student Sandra Tannen is one of the people who appear to have Katie's welfare at heart.

Louise tells the entire story; Wes loved his mother very much, and when she died due to an accident, he projected his feelings for her onto Katie.

The last message before the screen turns black and the credits appear, reads: "Katie's inability to learn a language proved the legitimacy of the Critical Period Hypothesis".