Being a previous victor, he presumably mentored other tributes for the games. At the chariot rides, he was dressed as a loaf of bread in the book, and in the movie, a golden outfit that resembles grain, District 9's industry.
It is unknown if he showed up for training or not, as he was never mentioned in the novel. However, he is seen waiting his turn for his private session in front of the Gamemakers.
During the interviews, he wore a sleeveless, long vest with a leaf and plant motif. After all the tributes were interviewed, he, along with the other tributes, joined hands as a sign of rebellion against the Capitol.
The District 9 male was killed in the initial Cornucopia bloodbath. He was presumably killed by one of the Careers. In the film adaptation however, he is shown fighting Peeta and tries to pull him underwater to drown him. Underwater however, Peeta gets out of his grasp and somehow kills him.