Virgil Tibbs is a fictional character created by author John Ball. He first appears in the novel "In the Heat of the Night," published in 1965. Tibbs is an African American homicide detective from Philadelphia who becomes involved in a murder investigation in a racially tense Southern town. His character is known for his intelligence, professionalism, and ability to navigate complex social issues. The character gained further popularity through the 1967 film adaptation, where he was portrayed by actor Sidney Poitier. Tibbs' interactions with local law enforcement, particularly with Chief Bill Gillespie, highlight themes of racism and justice. The story has since inspired a television series and several sequels, solidifying Tibbs' place in popular culture.