Why did robin become red hood?

Robin, specifically Jason Todd, became Red Hood after his tragic death at the hands of the Joker. Resurrected and filled with anger and resentment towards Batman for not saving him, Jason sought to redefine his identity and methods. Adopting the Red Hood persona, he aimed to challenge Batman's moral code and take a more lethal approach to crime-fighting. This transformation reflects his struggle with betrayal and the desire for vengeance.