TSA Forensic Technology

Passive Stains - -Drops, Flows, and Pools, results from gravity acting Transfer Stains - -object coming in contact with existing blood stains and leaving wipes, smears, or pattern transfers Impact Stains - -blood projecting through air and usually seen as splatters. (May also include gushes, splashes, and arterial spurts.) Gunshot Splatter - -Includes forward splatter from exit wound and back splatter from entrance wound. Typically: Forward is a fine mist and the back is larger, fewer drops. Cast-Off - -Results when an object sung in arc flings blood onto nearby surfaces. Tail points in direction of motion and the number of arcs can show minimum number of blows. Arterial Spray - -Spurt of blood when a major artery is severed with new pattern created each time the heart pumps Expired Splatter - -blood from an internal injury mixing with air from lungs being expelled through the nose, mouth, or an injury to airways or lungs, forms a very fine mist and some blood stains are latent. Sharp Force Injuries (Stabbing) - -Less blood being deposited on the instrument, smaller more linear patterns of stains Blunt Force Injuries (Hitting or Beating) - -larger surface area will collect more blood, producing drops of various sizes. Gunshot Injuries - -Mist like splatter caused by bullets entering and exiting a body. Transient Evidence - -evidence that might be expected to degrade or disappear within a particular time frame Exsanguination - -Bleeding to death Sharp Instruments - -Make incised wounds Blunt Objects - -Produce lacerations (deep cut or tear in flesh or skin) Altor Mortis - -Cooling of body after death How long Lividity Lasts - -36 hours Lividity - -Discoloration of the body after death. Takes minutes to an hour Rigor Mortis - -Stiffening of a body after death. It takes about 4 hours after death Classified as Traumatic Death - -Suicidal, Homicidal, Accidental 5 Manners of Death - -Natural, Accidental, Homicidal, Suicidal, Undetermined Manner of Death - -The Fashion of how the death came to be Mechanism of death - -The fashion of how the death came to be Considered Trauma - -Thermal, Mechanical, Chemical Number of permanent teeth found in a typical human mouth - -32 Most likely be the most clear and distinct bite - -A fresh bite into tissues containing lots of muscle Poorly defined bite marks associated with possible tearing of tissue and frequent occurring as multiple bites - -Defensive Bite Marks Field that studies disease, disease causes, and diagnosis of disease - -Pathology The Primary Duty of a forensic expert in a court of law - -To Tell the Truth what Forensic Science is often called - -Public Science Fundamental purpose of the criminal justice system - -to protect the right of the accused Word the ancient Greeks used to indicate the proper harmony of feeling and intellegence - -Reason Decides if someone is qualified as an expert witness - -The Judge