BC: Forensic in action over the years
FC: Forensic Science 2008-9
1: Contributers: Casey Anna Ryan Chris
2: Ist Officer *secure the scene *detain any wittnesses *arresting perp if present | Sketching the scene is very important to help tell the story of the crime
3: Searching the scene for evidence can be done in various ways: Grid, linear, quadrant or zone , and spiral are all types of search patterns used.
4: collecting and organizing data from the crime scene. direct evidence includes first hand observations: eyewitness and video cameras
5: for ex: pet hair, fingerprints, blood on shirt, mucus and saliva. Circumstantial evidence is an indirect evidence thars used to imply a fact but does not directly prove it.
6: Evidence.?!. | Some types of evidence include; Wet & dry blood, Tissue, Hair, Fibers, Cigarette and Cigar Butts, Displaced Furnition, Soil, Glass, Documents, Tools, Tire Tracks, and Footprints.! | There are two MAIN types of evidence: Class evidence and Individual Evidence. | *Individual Evidence; a kind of evidence that indentifies a particular/specific person or thing. Example: DNA.
7: *Individual Evidence; a kind of evidence that indentifies a particular/specific person or thing. Example: DNA. | *Class Evidence; Material that connects an individual person or thing to certain group. Example: blood type.
8: Time frame of death; | Time of death.. | Appearence; 30 min to 2 hrs 24 hours 36 hours 36 to 48 hours 4 to 7 days More than 1 year | Condition; Periphery blood drying Blue-green discoloration of skin Area of abdomen Entire abdomen Bloating Skin slippage Absence of smell of blood | Time frame of Death..
9: Rigor Mortis- Period of time through which the body moves through a state of rigidity. Livor Mortis- The settling of the blood, causing the skin to change colors. Lividity indicates the position of the body after death. It usually becomes between 10 and 15 hours after death. | Algor Mortis- The bodies tempature. | Temp. of body- Warm--------- Warm--------- Cold----------- Cold----------- | Stiffness of body- Not stiff--------- Stiff-------------- Stiff-------------- Not stiff--------- | Time since death Not dead more than three hours Dead between 3-8 hours Dead 8-36 hours Dead more than 36 hours
10: Fibers. There are two different types of fibers. These are called synthetic or natural. Knowing the difference between the two can help reveal information about the suspect and his/her enviornment.
11: Fibers and textiles are usually used to help link a crime to a suspect.
12: Pollen and spores are reproductive and resistant structures. They include gymnosperms, conifers, pine trees and cedar trees.
13: Pollen could be any color and size. In order to see pollen you have to use a light microscope.
14: DNA: is a genetic material of an organism. dna in a human cell is grouped into 23 pairs of chromosome. each pair contains genes
15: DNA identification: DNA fingerprinting: in order for fingerprints to match, the columns must have bands in the right places.
16: Fingerprints have different characteristics, these are loops, whorls, and arches. About 65 percent of the population has loops. 30 percent has whorls, and 5 percent has arches.
17: fingerprints are very important, because they can solve crimes. The two things a forensic examiner looks for is the presence of a core and deltas.
18: Impressions can be very helpful in the solving of crimes. Impressions are basically the enviornments way of recording what has happened. An impression is a peice of evidence left behind at the scene of the crime in the form of an imprint. Such things can be left by people, vehicles and certain objects. EX. tire tracks, shoe prints, footprints, teeth marks.
19: There are three different types of impressions. These are called patent, latent, or plastic.
20: B0NES . | With the analysis of bones, someones indenitity, sex, height, race, and backround can be determined. | ------------------------------------------------------------
21: To sum it all up, bones contain a record of the physical life.. | As we age and live our lives, our bones break down, reshape, and repair.. | Bones tell about a persons age, level of physical activity && even their state of nutrition.! Have you had enough calcium.? | An adult has 206 bone(when fully developed). A baby has 450.!
22: there are 14 ways the government determines counterfiting | many people try to get away with forgery and the falsfying of documents,with the intentions of decieving someone.
23: there are 12 exemplars of hand writing,that the government has discovered to prevent people from forging something
25: to determines a persons blood type ,scientists need to find the prescence of proteins located only on the red blood cells. blood spatter is a group of stains found at a crime scene, it has been used in investigations scince the 1890's.
26: hair texture can vary considering the the ratio of the cuticle to the medulla. hair grows from a bunch of cells called follicles.
27: the hair shaft is composed of three parts ,cuticle,cortexand the medulla. | hair fibers are excellent for id study because, they resist decomposition, and may indicate drug use or poisoning.