The Interrogation Room

     The interrogation room should be a small plain room about eight feet by ten. It should have one door with a small window, covered by material that can be easily removed from the outside to allow officers to view the subject when he …

     The interrogation room should be a small plain room about eight feet by ten. It should have one door with a small window, covered by material that can be easily removed from the outside to allow officers to view the subject when he is alone. The walls should be of a neutral color with nothing hanging on them. [No distractions.] A table or desk and two chairs should be the only furniture.

     Sit the suspect with his back to the door so he doesn't think about freedom. Sit directly in front of the suspect two to three feet away from him. You must be able to see the suspect's entire body to detect any movement. Never sit across a desk or table from a suspect because you won't be able to see his lower body or hands. [Not only that, a desk or table between you and the subject makes him feel less vulnerable.] It's better for just one interrogator in the room. [And never wear a gun during an interrogation.]

 Albert Joseph Jr., We Get Confessions, 1995 

from http://jimfishertruecrime.blogspot.com/