quiz 4 Flashcards
unit identifies and compares specific types of trace materials that could be transferred during crime
trace evidence unit
unit examines and compares data appearing on paper
questioned documents unit
unit analyzes bodily fluids and fluid stains
DNA analysis unit
unit examines firearms, firearm components, ammunition, ammunition components, tools, and tool marks
ballistics unit
what does trace evidence unit look at
hair, fibers, fabric, rope, twigs, leaves, pollen, mineralogy
what does question documents unit look at
handwriting, typewriting, printing, erasures, alterations, impressions, obliterations
what does DNA unit look at
blood, semen, bone, teeth, saliva, other bodily fluids
what does ballistics unit look at
shot patterns, GSR, trajectory, serial # restorations, compare bullets and ammo to specific weapons
what should you do as soon as you see visible prints
take photos
used for scientific evidence that has gained general acceptance in the scientific community
frye standard
legal precedent in 1993 regarding the admissibility of expert witness testimony
daubert standard
two prongs of daubert
relevancy, reliability
technique that analyzes locations of a connected series of crimes to determine where the offender most likely resides
geographic profiling
what is a simultaneous lineup
witness to look at all people or photos at the same time, most common
what is a sequential lineup
people or photos presented one at a time
request of a sample of writing by law enforcement to the sole purpose of comparison
requested exemplars
samples of suspects handwriting that was not written for the purpose of examination and is not evidence
collected exemplars
where should you start dusting for fp
point of entry
dna can ______ from being a suspect
eliminate
fp database
afis, run by fbi
clarksburg, wv
cant use ____ words when interrogating
suggesting
gloves _____ leave marks or fp
CAN
fp presses against plastic and leaves a negative impression of friction ridges
plastic fp
fp on something that is made by touching another substance
visible fp
technique recognizes that hate, passion, fear, and
confusion may all have certain indicators somewhere
at the scene
psychological profiling
The development of psychological characteristics of the suspect and social characteristics surrounding the crime
personality profiling
5 elements of dna
carbon, hydrogen, oxygen, nitrogen, phosphorus
how many pairs of chromosomes do humans have
23
