After Gellert Grindelwald (disguised as Percival Graves) sentenced Newt Scamander and Tina Goldstein to death, Bernadette helped lead them to the Death cell. She extracted Tina's memories and cast them in the death potion and encouraged her to get in.[1] Just as her fellow executioner was about to do the same to Newt, he broke free (his pet Bowtruckle having picked the lock on his handcuffs) and unleashed his Swooping Evil
which knocked out the third executioner. The second executioner tried
to use her wand on Newt, but he redirected her aim so that she hit
Bernadette with a Stunning Spell instead.