-External Examination: Clothing is removed and documented, Sex, approx. age, height, weight, eye color, hair color, scars,tattoos, birthmarks are noted, photo'd and measured. Body condition (decomposition), External injuries ( wounds, scrapes, bruises, petechiae)
-Internal Examination: Y incision is made to expose the internal organs and the skull is cut to expose the brain, some or all internal organs will be removed, noted, weighed, measured and examined, internal tissue can be looked at based on the external injuries, evidence can be collected from internal exam.
1. The comparison microscope: Combination of two compound microscopes, side by side views, uses a bridge and a series of mirrors to connect the images. Example;Bullets, cartridges, hairs and fibers.
2. The stereoscopic microscope: Not too high of magnification 10X to 125X, large working distance can examine bulkier items. Examples; paint, soil, gunpowder residues, marijuana
3. The polarizing light microscope: Utilizes the fact that light vibrates, polarizer is placed to block out certain planes of vibrating light.
4. The microspectrophotometer: Creates an absorption spectrum, can use visible light or IR light, light is either reflected or absorbed, can show subtle differences in similar items.
forensic scientists use to study documents & ink may be helpful
-device connects a microscope to a spectrophotometer
-allows forensic scientists to view very small piece of ink or document while beam of light is directed at the part & measurements about its absorption are taken
5. The scanning electron microscope: Uses a beam of electrons rather than light, high magnification, high resolution and great depth of focus, crates an image of the specimen. Example: Marijuana leaf
Natural fibers derived from animal or plant sources
-wool, cashmere, camel, alpaca, cotton
Manufactured fibers began in 1911 with the development of rayon , then nylon in 1939, can be grouped into larger generic names. man made, created in fabrics
-polyester, rayon, nylon, acrylic, spandex