Players on the field must know the rules of the game, just as players in the interview room must know the rules of their game. In football, once the line is set, if one of the offensive linemen move before the football is hiked a false start is called and there is a penalty of five yards. If an officer interrogates a suspect who is in custody without first issuing his or her Miranda warnings, it's similar to a false start because custodial interrogation began before the individual was advised of his Constitutional rights to remain silent and have an attorney present.
Another rule in football involves a called "timeout." If the players continue the play, that play doesn't count, even if it's a touchdown. The same is true during an interrogation when a suspect calls a "timeout" in a sense by asking for an attorney. If the officer disregards the request and continues the interrogation, any information, even if it is a confession, doesn't count and will be suppressed in court. It is important that you know and follow the rules of the game when conducting interviews and interrogations.
Several years ago, "instant replay" was added to review the call made on the field by referees. In many circumstances, this review process reverses the ruling on the field and changes the course of the game. The same is true in our profession, especially with the increasing use of audio and video recording of interrogations. Whether we record the interrogation as part of our departmental policy or statutory requirement, or if one of our fellow citizens records our actions on the street, the recording can be reviewed by the court, media, and your department.
In football, the quarterback controls the movement of the ball. It is not a free-for-all where each player takes a shot at throwing the ball down the field. When conducting interviews and interrogations, we should apply the same principle. There should be a primary or lead interviewer conducting the interview or interrogation, and when there is a second person in the room, they should be listening intently and taking good notes. When the quarterback (lead interviewer) is done calling the shots, he or she may then throw you the ball by asking you if you have anything further. That's your cue to engage the suspect with your questions.
The football players on the field don't start the game without having a game plan. Having a well-thought-out game plan, taking into consideration the strengths and weaknesses of your opponent, and executing that plan, is what wins games. Many investigators fail with this one and go into "wing it" mode.