When an object with blood on it touches one that does not have blood on it, this produces a(n):
investigators use proper documentation and collection methods for all types of evidence
Crime scene reconstructions have the best chance of accuracy if:
the environmental condition of the scene
The approximate drying time of a pool of blood can be used to estimate timing of events at a crime scene and is dependent upon:
it can be concluded that the firearm was present during injury to the victim
If a murder victim's blood is found in the muzzle of a firearm:
The amount of spatter from a blood droplet falling on a hard, nonporous surface is _____________ that of a drop of blood of equal size, falling from the same distance, onto a softer, porous surface.
the results of DNA analysis performed on the root structure
In determining whether a hair sample originated from a male or a female, the MOST important consideration is:
all of the above
After examining small paint chips from an auto accident scene and using the PDQ database, the crime lab worker may be able to determine the __________ of the vehicle.
The presence of sheath cells on hair that has been pulled quickly from the head is __________ the presence of sheath cells on hairs that have been removed slowly from the scalp.
The brand name used to start the fire
Which of the following cannot be determined from a laboratory examination of evidence recovered from an arson?
The rapid combination of oxygen with a fuel, which produces a noticeable release of energy is called:
Which instrumentation is considered the most sensitive and reliable for detecting and characterizing flammable residues?
The minimum temperature at which a liquid fuel will produce enough vapor to burn is called the:
__________ explosives detonate almost instantaneously to produce a smashing or shattering effect.
Debris recovered from the site of an explosion is routinely rinsed with __________ in an attempt to recover explosive residues.
they are widely used to help trace an explosive to its last legal possessor
What is NOT true about taggants?
A device used to screen objects for the presence of explosive residues is:
bifurcation and ridge ending
The most commonly encountered ridge characteristics (used by AFIS) are the:
No minimum exists. Final determination must be made based on experience and knowledge of the expert.
What is the minimum number of ridge characteristics necessary before two fingerprints can be identified as the same?
take a 1:1 photograph of the print
After successfully visualizing a latent print on an object an investigator should next:
the edge of the trigger guard or by the checkered portion of the grip
To prevent the disturbance of latent fingerprints on a firearm, the weapon should be lifted by:
barium and antimony
Two elements detected on the hands of an individual who has recently fired a weapon are:
all of the above
The comparison of two bullets is possible with the comparison microscope. Such as study is made difficult by the fact that:
transported to the crime lab in a container with enough of the same water necessary to keep it submerged
When a gun is recovered from an underwater location, it should be:
The likelihood of detecting GSR on swabs taken from living subjects more than six hours after a firing has occurred is __________ the likelihood of detecting GSR within two hours of a firing.
bullet will be made to spin and hence have a true and accurate course on leaving the barrel
The reason grooves are rifled into the bore of a fun is so that a:
SEM primer residue detection
Which technique of detecting GSR holds the most promise for the immediate future?
The process by which the image is stored in memory by scanning and converting by computer into an array of digital intensity values called picture elements is known as:
all of the above
In dealing with fax machines, photocopiers and computer printers, which class characteristics might be examined?
prepare at least one copy of the text in full word-for-word order
If an investigator is to prepare standards from a suspect typewriter, the following procedure is recommended:
Inks on handwritten documents may be compared for their chemical composition by the technique of:
Document examiners frequently uncover the original writing of words that have been crossed out with the aid of:
Defects that are reproduced by a photocopier onto a copied document may originate from defects in all of the following photocopier parts except:
__________ writings are partially visible impressions appearing on a sheet of paper underneath the one on which the visible writing was done.
fifth amendment privileges apply
With regard to the constitutionality of obtaining handwriting exemplars, the courts have ruled all of the following EXCEPT:
do so without altering the drive in any way
The ultimate goal of obtaining an image of a hard disk drive is to:
procure a warrant to search
The first thing a crime scene investigator should do when encountering computer forensic evidence is:
A(n) __________ is placed on a hard disk drive by a website to track certain information about its visitors.
all of the above
Which of the following is/are potential sources for forensic evidence on a suspect's personal computer?