#Forensic Science

Magnetic Powder

By Pat A. Wertheim This article originally appeared in Minutiae, the Lightning Powder Co. Newsletter, #43, July-August 1997. Even though magnetic powder has been available since the early 1960’s, many latent print…

Ninhydrin Processing

By Pat A. Wertheim This article originally appeared in Minutiae, the Lightning Powder Co. Newsletter, #45, November-December 1997. Perhaps the most productive and cost-effective method of developing latent fingerprints on paper is…