Coffee Break Training: Fire/Arson and Explosion Investigation Curriculum: Interviewing/Interrogation: 10 Common Indicators of Deception - Part 1 [open pdf - 188KB]
"In many arson cases, it is often the interviewing and interrogation skills of the investigator that are instrumental in solving the case. It is critical that investigators are aware of and study both the verbal and nonverbal behavior of a subject to detect possible deception. Suspects and witnesses often reveal more than they intend through their choice of words. The following 10 signs are often indicative of possible deception in written and oral statements indicating that an individual may be withholding, altering or fabricating information[.]"
Coffee Break Training - Fire Investigation Series No. FI-2013-6
U.S. Fire Administration: http://www.usfa.dhs.gov/