The effect of mark enhancement techniques on the presumptive and confirmatory tests for blood
An investigation into the effects of physical and chemical enhancement on subsequent presumptive and confirmatory tests for human blood is presented. Human blood was deposited onto porous (white 80 gsm paper and brown envelope) and non-porous (tile and linoleum) substrates in a depletion series (30 depletions on non-porous and 20 on porous) and subjected to three ageing periods; 1, 7 and 28 days. A number of enhancement techniques were tested [fluorescence, black magnetic powder (BMP), iron-oxide black powder suspension (PS), cyanoacrylate (CA) fuming, acid violet 17 (AV17), acid yellow 7 (AY7), ninhydrin, DFO and Bluestar Forensic Magnum (BFM) luminol] to evaluate their potential e ffects on subsequent presumptive and confirmatory tests.
Source: Science and Justice - Category: Forensic Medicine Authors: Vanessa Stewart, Paul Deacon, Nathalie Zahra, Mari L. Uchimoto, Kevin J. Farrugia Source Type: research