Non-Accusatory Questions
Structuring an interview based on behavior-provoking, non-accusatory questions to elicit interpretable behavior symptoms is a typical way you may determine innocence or guilt. You should understand that although a meeting with the suspect may be non-accusatory for the purpose of eliciting alibis or explanations, it can turn into an interrogation at any time.
A professional, yet friendly, approach to the person being interviewed is the most effective way to establish rapport. A quick way to do this is by finding some common ground or interest, since people tend to like people who have similar interests and personalities.
By reading the suspect's personality, you can establish rapport by changing topics to discuss points of interest common to both of you. Try to connect with the suspect on one of the many similarities most people have. For example, common ground might be found in weather, family, work frustrations, bills, children, etc.
You will be judged by your appearance during the first few seconds. So consider removing handcuffs, weapons, or radios, which might create a sense of unease. Words such as witness, victim, court, and testimony, or slang terms used by police can also create an unacceptable image. Avoid any words that trigger negative responses or recreate the seriousness of the crime.