Because she saw that Maria had a turtle tattoo on her neck.
I watched a movie yesterday.
Which book.
First one, she impressed them with her amazing shot by shooting the apple, and it was unique because it was risky. She in a way, called them out for their lack of attention, which is an attitude few tributes have.
Second one wasn’t so unique because it was similar to peetas, but again she called them out for killing (no spoilers).