No escape is a paper note in Fallout 76, introduced in the Expeditions: The Pitt update.
Location[]
The note can be found on a table in a cell in the catacombs of the Sanctum in The Pitt during From Ashes to Fire. It is in the cell closest to the water pool with the fishes.
Transcript[]
Lost Matt last night... I told him not to go, he insisted he'd be fine since the beasts have begun to leave us alone.
He didn't make it far before we heard a bear trap catch his leg. His screams brought every one of the beasts down onto him. At least it was over quick.
Is this why the guards stopped locking our cells?