In the unfolding events of Hunger Games: Catching Fire, the attack on Cinna and his off-screen death shook the Hunger Games timeline. Catching Fire showed Cinna being removed by Peacekeepers before Katniss Everdeen went into the Quarter Quell. His arrest was one of the moments that made audiences cry. Cinnas indirect support of the rebellion as Katniss’ stylist made him a target for the Capitol. He chose to revolt differently than other characters, but his close relationship with Katniss highlighted his compassionate nature. Sadly, it also foreshadowed that his vulnerability would lead him to disaster.
https://screenrant.com/hunger-games-catching-fire-cinna-attacked-death/