
June Harrow recognizes the salt exit route because she once used it to get another witness out of Halden.
June wants Theo to use the route as evidence, not as a desperate escape, because she has seen what happens when a witness vanishes inside Halden.
Source stage
More discoveries

Dorian Hale wants the red tomorrow signal jammed because its leak accusation is built from a rule she broke to save a witness.

Dorian Hale recognizes the face in Nora's mirror badge from sealed access records tied to her old supervisor.

Dorian Hale can read the copied cut on Nora's third key because she once logged every marshal override after a leak.

Dorian Hale can prove the storm alert is false with a roof-sensor feed she was never cleared to keep.