. How police forensic teams locate traces of latent blood on clothing, even after it has been cleaned several times

Fluorescein is a presumptive blood test for latent bloodstain detection. It has been used in forensic applications to reveal trace amounts of blood. Traces of latent blood can be detected even after repeated cleansing of the crime scene. Fluorescein is highly sensitive to the hemassociated molecules (enzymes and iron) in the red blood cells, (1:105,000 depending upon the dilution rate of the working solution) [1-2]. Traces of these hemassociated molecules will embed themselves on the substright, even after multiple cleanings. Fluorescein can also be used to discover and enhance shoe tracks leading from a bloody crime scene thus allowing investigators to follow the suspect's trail [3]. Fluorescein can Fluorescein is a presumptive blood test for latent bloodstain detection. It has been used in forensic applications to reveal trace amounts of blood. Traces of latent blood can be detected even after repeated cleansing of the crime scene. Fluorescein is highly sensitive to the hemassociated molecules (enzymes and iron) in the red blood cells, (1:105,000 depending upon the dilution rate of the working solution) [1-2]. Traces of these hemassociated molecules will embed themselves on the substright, even after multiple cleanings. Fluorescein can also be used to discover and enhance shoe tracks leading from a bloody crime scene thus allowing investigators to follow the suspect's trail [3]. Fluorescein can be used to locate traces of latent blood on clothing, even after it has been laundered several times (best preformed at the lab). It can also be used on vehicles (inside and out) [4]. Some studies have been conducted on the development of bloody latent finger/palm prints [5]. There are two basic forms of Fluorescein that are typically used in forensics.s (best preformed at the lab). It can also be used on vehicles (inside and out) [4]. Some studies have been conducted on the development of bloody latent finger/palm prints [5]. There are two basic forms of Fluorescein that are typically used in forensics.