Interesting Latent Impression in a Questioned Document Case

• NCJ Number: 132182
• Journal: Journal of Forensic Identification Volume: 41 Issue: 2 Dated: (March/April 1991) Pages: 89-91
• Author(s): W D Mazzella; E Sapin; P A Margot
• Date Published: 1991
• Length: 3 pages
• Publication Format: Article
• Publication Type: Report (Technical Assistance)
• Language: English
• Country: United States of America
• Note: *This document is currently unavailable from NCJRS.

Annotation

A case is presented to illustrate the advantage of a flexible and powerful light source, such as the Polilight system, for questioned document examination.

Abstract

The complete impression, a handwritten address and two telephone numbers from a personalized notebook, only became visible when using the arc lamp and specific illumination and observation conditions. Observation was performed while using a 550 nm glass cutoff filter. The details contained in the luminescent impression were a key element in this case as they confirmed the statement made by one of the parties involved. Another laboratory had failed to decipher the impression during three previous examinations. 3 figures