- 01: Introduction
- 02: History
- 03: Propellants, Firearms, and Ammunition Development
- 04: Modern Firearms Manufacture
- 05: Small Arms Ammunition
- 06: Evidence Handling Procedures
- Introduction
- Objectives
- AFTE Knowledge and Ability Factors
- Types of Evidence
- Associative Evidence
- The Crime Scene
- Evidence Submission
- Laboratory Evidence Handling
- Case Tracking Within the Laboratory
- Firearm and Toolmark Examination Considerations
- Selected Bibliography
- 07: Equipment and Instrumentation
- 08: Examination of Firearms
- 09: Cartridge and Shotshell Examination
- 10: Characterization and Evaluation of Fired Projectiles
- 11: Bullet Comparison and Identification
- 12: Gunshot Residue and Distance Determination
- 13: Toolmark Identification
- 14: Communicating Results
- Resources
Trace Evidence
Home > Evidence Handling Procedures > Types of Evidence > Physical Evidence > Trace Evidence
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Trace blood
Click for larger imageTrace evidence is a subtle category of physical evidence that is minute and transient, but measurable. Typically, this evidence does not appear until larger items of physical evidence are subjected to closer examination in the laboratory. A microscope with good illumination or other instrumentation may be required to detect the presence of trace evidence.
The importance of trace evidence cannot be overemphasized. Awareness of this type of evidence can be critical to an investigation; training and experience are essential to maximize the value of this type of physical evidence.
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Trace wood
Click for larger imagePhotographing the area where the evidence is collected not only provides documentation of the collection but also assists in locating trace evidence.
Even if identification cannot be made in the laboratory, the investigator and prosecutor may use trace evidence as part of a convincing circumstantial case. Successfully presenting trace evidence in the courtroom requires additional skill and effort during collection, testing, and case preparation.
