What cognitive interview method techniques could a police officer use to find out what a witness recalls about an event?

The Cognitive Interview technique (Fisher and Geiselman, 1992) is an interview method devised to enhance the retrieval of information from a witnesses memory. It consists of a series of memory-enhancing techniques which allow the witness to better remember certain details of a scene. In order to prompt recall, the interviewer could use a multitude of techniques such as mentally reinstating the environmental and personal context of the crime for the witnesses, asking the witness to report the incident from a different perspective, recounting the incident in a different narrative order or asking them to report every detail even if it does not seem important to the case.