Who is the killer in the pink panther m?

In "The Pink Panther" film series, the primary antagonist, often referred to as the killer, varies from movie to movie. However, in the original 1963 film, the main plot revolves around the theft of a valuable diamond known as the Pink Panther, with Inspector Clouseau (played by Peter Sellers) trying to solve the case. The identity of the thief is revealed to be Sir Charles Litton, played by David Niven. The series is known for its comedic approach to mystery, often leaving the audience guessing.