After killing the warden, the prison can be accessed, but the prisoners must still be freed. After wading through the prison, Judge Wolfnick is eventually found. He refuses to "lend a hand", so must be killed. After he dies, his severed hand can be picked up and used to open the prison cells. The player can then use the newly found teleporters to return to the base to get a new briefing from Macil.
The use of his hand is somewhat like the use of the hand in the Doom Bible.