Who was L.B. Sullivan in the New York Times Co. v. Sullivan case?

In the landmark legal case New York Times Co. v. Sullivan, L.B. Sullivan served as the police commissioner of Montgomery, Alabama.1

Following the publication of a 1960 advertisement in The New York Times that criticized the treatment of civil rights demonstrators in the South, Sullivan initiated a libel suit against the newspaper. Although the advertisement did not explicitly name him, Sullivan argued that it cast aspersions on his character by implying that the police force he oversaw was complicit in acts of terrorism and violence against African Americans.1

Sullivan successfully won a $500,000 judgment in state court, as Alabama law at the time held that the burden of proof for factual accuracy rested with the publisher. However, the U.S. Supreme Court later overturned this, establishing that public officials must prove "actual malice"—knowledge of falsity or reckless disregard for the truth—to succeed in a libel claim, thereby significantly strengthening protections for freedom of speech and the press.1