Trace Evidence
Trace blood
Click for larger image
Trace 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.
Trace wood
Courtesy of Ronnie Freels
Click for larger image
Photographing 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.
< Previous Page :: Next Page >