Precinct 12 was a police precinct, near to downtown San Francisco, in the Dixon Hill series. Police officers Dan Bell and McNary were assigned to this precinct.
As the character Dixon Hill, Captain Jean-Luc Picard was interrogated at a Precinct 12 interrogation room by police lieutenants Bell and McNary for information on his relationship with Jessica Bradley and his location during the time of her murder. (TNG: "The Big Goodbye")