Pugnax

Pugnax was a District 2 citizen who formally was employed in the Nut.

Mockingjay
Pugnax was among the many workers and miners who survived the Nut bombing and fled to the city center, where the rebels (who launched a major offensive and captured it) were waiting for them. Katniss made an impromptu speech to the Nut personnel, ending when an where man shot her from inside the crowd. She survived, but she lost her spleen and her ribs were badly bruised, leaving her out of action for a month.

Mockinjay Part 2 (Film)
In the film, Boggs orders all the evacuees to drop their weapons. Pugnax refuses and begins to get shot by Katniss tells the rebels to stop. Katniss confronts him and Pugnax puts a gun to her neck. He says give me one reason why I shouldn’t kill you, but Katniss gives no answer. She gets up and he shots her in the stomach and then the Rebels shoot him to death.

Trivia

 * Pugnax remains unnamed in the book. His name is revealed in the movie.