Falsely Accused

Falsely Accused is a side quest in Fallout 76.

Quick walkthrough
Killing the prison marshals that are a random encounter only in the Toxic Valley will start the quest. Looting one will find the arrest warrant holotape and cause a voice recording to play, leading to the first step. Follow the waypoint to the Eastern Regional Penitentiary to the southwest on Highway 92. Talk to the Warden upstairs when you walk into the penitentiary and he will give you a "Penitentiary security password". Use this password to activate turrets in each block. Once you do this then head back to the Warden's office and talk with the warden.

Detailed walkthrough
The quest begins when the player character randomly encounters 2-3 prison marshals in the Toxic Valley who try to kill them. After defeating the marshals, an arrest warrant on one of their corpses will reveal that the marshals were sent to recapture two fugitives who had escaped from the Eastern Regional Penitentiary. Head to the penitentiary in the Toxic Valley and talk to the warden in the administrative offices upstairs.

The Warden will give the player character the task of activating turrets in each cell block. One will receive the security password and should go to the security terminal in every cell block and choose the option to "Activate Turrets". Once this has been completed, speak with the Warden and he will end the quest. Completing the quest will reward experience and a unique shotgun called Civil Unrest.