Get the Facts
In this session of Interview and Interrogation for Writers Sgt. Derek Pacifico, retired Homicide Detective discusses some of the interview mechanics of conducting a proper, legal and fact-filled interview. These techniques apply to any situation really; human resources, person-to-person sales, conducting research interviews, etc.
Anytime you want basic fact-filled information. This is the method.
If you have a cop in your story, this is how he leads the suspect down a path to sort the facts from the lies.