Dave Cullen is an American non-fiction writer, freelance journalist, and filmmaker best known for Columbine and Parkland: Birth of a Movement, two books about school shootings. He has spent twenty-six years covering LGBT troops in the military, and his upcoming book, Don't Fall in Love, follows two gay soldiers over a 25-year project. Cullen has also executive-produced a short documentary on Parkland and has begun adapting his work for television.
