 The film's armorer, Hannah Gutierrez, stood trial earlier this year for involuntary manslaughter. And the mystery of how live rounds ended up on the film set was solved as it was revealed that she had mistakenly mixed up dummy rounds with real bullets that belonged to her. Sentencing her to 18 months in prison, Judge Mary Marlowe-Summer said it was her actions and lack of proper checks that led to Helena Hutchins' death. You were the armorer.