Examining Prints, Inks, Plant And Animal Materials

Forensic detectives and scientists maximize all the evidence they collect in a crime scene. Prints, inks, plant and animal materials associated with the scene of the crime are collected and analyzed using forensic microscopes such as a forensic comparison microscope.

PRINTS AND INKS

When a car knocks down pedestrian, tiny chips of paint from the vehicle may become trapped in the victim’s clothing. It is the same when a burglar breaks into a house, pieces of paint from the door or window frame may stick to his clothes. If these are found, they can find the hit-and-run driver or a burglary suspect to the scene of the crime using the analyzed data from the forensics laboratory. Perhaps the paint chips can be matched using forensic comparison microscopes, like the pieces of a jigsaw puzzle; or the various layers of paint-primer, undercoat and topcoat –can be compared for color, thickness, and chemical composition. It is also possible to identify a car model, make a year from its layers of paint. Similarly, inks and ink marks can be examined under a forensic microscope to establish criminal connections. The pain coating can be viewed under a forensic microscope.

PLANT AND ANIMAL MATERIAL

FThe suspect who escapes through the garden or field will almost certainly pick up something on his clothing. These might come from the plants that he brushed against while running away from the scene of the crime. If he had walked on a carpet or in the house or in a car, hairs from a pet animal may have stuck to the soles of his shoes. Forensic scientists can use these as clues. Studying them under a forensic microscope such as a forensic comparison microscope can establish the types of plants or animal where they originated. Same with clothes fibers and paper, each species of flowering plants has pollen grains of a unique shape and fruits with special structures. A strand of hair analyzed and studied under a forensic microscope can determine whether it came from a cat, dog, hamster, rabbit or any kind of hairy animals.

Some plants have some characteristics that can easily stick on some clothes. These are commonly known as burrs. They each contain one seed which dispersed by means of tiny hooks that normally stick onto an animal’s fir it is brushes against the plant. Eventually, the burrs splits the seed drops out onto the new ground. This is will be used as a clue to which the suspect has been to.

FINGER PRINTS AND FOOT PRINTS

A criminal, for example a burglar who breaks into a house to steal something, almost always leave traces of himself or his clothing in the premises. It maybe fingerprints on the table, or shoeprints in the backyard or in the carpet. Fingerprints can be seen under a forensic microscope. It could be tire marks made by his get-away car. Some of these clues would be visible to the naked eye, but they all need to be examined closely under a forensic microscope in order to make a possible identification. Fingerprints need to be developed and printed to be identified, and a plaster impression made of shoe or a tire marks.

Take a look at a number of car tires and soles of your friends or relatives. You will notice that cuts on the rubber, the tread, vary in shape, width and depth. On some tires and soles you may also see that tread has worn away more on the inside than on the outside, or vice versa. A tire print in mud can show, make, model, and even the age or mileage of a car. The tread may also have trapped pieces of glass, grass, nails or other objects that can be matched with those found at the scene of the crime or accident.

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