Amanda Waller was the director of the Suicide Squad. She was murdered by a man dressed as Batman.
Waller appears in the Quiver to capture Harley Quinn with her team. When Harley gets away, she orders Deadshot to stop her, to which he succeeded. Later when Harley wakes up in her base, she welcomes her in the Suicide Squad due to the fact that she now has a bomb in her head. When a guard is neutralized by a Batman, Amanda tells him that he can't go in a governement facility like that. This Batman imposter thanks her before shooting her and Rick in the face, killing them both.