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Season Two Research Files
Episode Thirteen
8:00pm-9:00pm
| - It can pick up dust, hair, seeds, and thousands of other items clinging unseen to a person or object. - Fire-creating ingredients such as kerosene fluorescence a bright blue or green. - Because of its exposure to X-rays, scar tissue glows a bright pearlish white flu (color) under the UV lamp. Scars from radium fluorescent a bright pale blue. Those from mechanical, electrical, heat or chemical injuries show no characteristic appearance under the lamp. - Invisible marking, used by some dry cleaners, as well as other fading marks can be clearly seen. Laundry marks, originally invisible or simply faded are immediately revealed under the rays of UV light. Collars, cuffs, shirttails and even the shirtfront may reveal a previously visible laundry mark obliterated by action of salt water. - Stains, secretions, lipstick, inks, flu powders and foreign matter become visible. Even after cleaning or dying, many fabrics can be linked to the original event. - Dynamite wrappings, candles, matches and other materials that go into the making of a bomb can often be isolated under UV light for more specific laboratory analysis. - Cerumen (earwax) usually fluoresces a bright blue, blue-green or blue-yellow. Most body substances' fluorescence will be effected to some degree by the medical history of the individual involved. - Rape semen stains fluoresce a bright bluish-white under a UV light and will retain such capability for years. The background material of cloth, its natural flu and color must be taken into account during analysis. Microscopic studies should be made for confirmation of that observed under a UV light. Semen stains also phosphoresce a bright green for a couple of seconds after exposure to short wavelength UV light. - Blood, saliva, vaginal fluids, sweat, feces and other DNA can be seen. Care should be taken when exposing such DNA material to ultra violet light as this can damage/denature the DNA. - Natural teeth fluorescence pearly white. False teeth fluoresce a very dull green or not at all. False teeth designed several years ago may appear dull purple or black under UV light. - Bleached hair will show a characteristic whitish flu. Rodent hairs have a bluish-white flu. Dyed hair is usually apparent. Some hair oils, as well as wigs, also show flu. - Obliterated serial numbers on forearms can be easily located. - Ransom money can be invisibly marked for identification and the area surrounding the contact point dusted with invisible fluorescent powders. Banks equipped with UV lamps can aid in tracking the passer of money and the invisible powder on the shoes, clothing, hands or hair of a suspect can place him at any one of the significant places involved. - Various types of paper appear quite different when viewed under UV light, although appearing quite similar in daylight. Some are very dark, while other types exude a rather bright flu. This effect can be used to indicate that certain sheets did not come from the same source, such as anonymous letters, ransom notes, poison pen letters. Paper should always be examined both under the lamp and directly over the lamp, thus allowing UV to penetrate the paper. Some artificial watermarks are often made with stamps prepared in a wax medium, and the impression will then glow under a UV light. - Some pepper sprays will leave an invisible residue on a assailant that can be illuminated with the use of an ultraviolet light. - "Ectoplasm," "spirit faces" and other phony props used by psychics are immediately exposed under UV light. |
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