Certainly the ideal circumstance for an investigative interview is a face-to-face meeting with the subject. However, due to a variety of factors, it is becoming more and more frequent for investigators to conduct telephone interviews. Part One of this Investigator Tip will highlight some of the issues to consider and the guidelines to follow in order to conduct an effective telephone investigative interview. Part Two will focus on the verbal and paralinguistic behaviors that the investigator should listen for during the interview that will help assess the credibility of the information provided by the subject.