David E. Kelley

David Edward Kelley (born April 4, 1956) is an American television writer and producer, known as the creator of Picket Fences, Chicago Hope, The Practice, Ally McBeal, Boston Public, Boston Legal, Harry's Law, Big Little Lies, and Mr. Mercedes, as well as several films. Kelley is one of very few screenwriters to have created shows aired on all four top commercial U.S. television networks (ABC, CBS, Fox, and NBC).