On 'The Big Bang Theory (2007)' episode "The Hofstadter Isotope," Sheldon's assertion that having Bruce Wayne know who murdered his parents destroys any motivation he has for continuing to be Batman comes directly from the works of
Chuck Dixon. Dixon is one of the most prolific writers of the Batman comic books, and specifically wrote a story for Detective Comics in which it is proven that Joe Chill did not kill the Thomas and Martha Wayne.