A total of 35 military participants were assigned to truthful or deceptive eyewitness conditions. Genuine eyewitnesses reported truthfully about exposure to interrogation stress. Deceptive eyewitnesses studied transcripts of genuine eyewitnesses for 24 h and falsely claimed they had been interrogated. Cognitive Interviews were recorded, transcribed, and assessed by FSA raters blind to the status of participants. Genuine accounts contained more unique words, external and contextual referents, and a greater total word count than did deceptive statements. The type-token ratio was lower in genuine statements. The classification accuracy using FSA techniques was 82 percent. FSA methods may be effective in real-world circumstances and have relevance to professionals in law enforcement, security, and criminal justice. (Published Abstract)