A grammar of colouring, applied to decorative painting and parts

It is hard for me to imagine that he didn't step in blood when pints of it were spurting and flowing from the fatal injuries he inflicted on his victims. But these bloody footprints would not have been visible without the aid of alternate light sources and chemicals. Trace evidence would have been missed, and one can be certain that the Ripper left hairs, fibers, and other microscopic particles at the scene and on his victims. He carried trace evidence away with him on his person, footwear, and clothing. The Ripper's victims would have been a forensic nightmare because of the contamination and mixture of trace evidence - including seminal fluid - from multiple clients, all of it exacerbated by the women's pitiful hygiene. But there would have been some substance, organic or inorganic, worth collecting. Unusual evidence may very well have been discovered. Cosmetics worn by a killer are easily transferred to a victim. Had Sickert applied grease paint to darken his skin, had he temporarily dyed his hair, or had he been wearing adhesives for false mustaches and beards, these substances could be discovered by using a polarized light microscope or chemical analysis or spectrophotofluorometric methods, such as the Omnichrome light, that are available to forensic scientists today ...»