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Forensic Science mid term chp 4 study

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Forensics Chp 4

Question 1 of 17

1

The amount of spatter from a blood droplet falling on a hard, non-porous surface is _______ that of a drop of blood of equal size, falling from the same distance, onto a softer, porous surface.

Select one of the following:

  • The same as

  • Less then

  • Greater than

Explanation

Question 2 of 17

1

The pointed end of a bloodstain always faces

Select one of the following:

  • Opposite its direction of travel

  • Toward the direction from which the force came

  • Its direction of travel

  • Toward the position of the blood source

Explanation

Question 3 of 17

1

A blood droplet deposited at an angle of impact of about 90º (directly vertical to the surface) will:

Select one of the following:

  • Show acute elongation

  • Feature a tail showing the directionality

  • Be elliptical in shape

  • Be approximately circular in shape

Explanation

Question 4 of 17

1

The most common type of bloodstain pattern found at a crime scene is:

Select one of the following:

  • Cast-off spatter

  • Void spatter

  • Impact spatter

  • Arterial spray

Explanation

Question 5 of 17

1

The velocity classification of an impact spatter pattern

Select one of the following:

  • Cannot illuminate the specific events that produced the pattern

  • Can determined the kind of action that produced the patter

  • Is never used for descriptive purpose

  • Can only be determined by a trained bloodstain pattern analyst

Explanation

Question 6 of 17

1

The intersection of straight lines through the long axis of several individual bloodstains in an impact spatter pattern illustrates the ______ of the pattern

Select one of the following:

  • Area of origin

  • Void patter

  • Area of convergence

  • Velocity classification

Explanation

Question 7 of 17

1

At the crime scene, the string method is used to find the ______ of an impact spatter pattern

Select one of the following:

  • Area of origin

  • Void pattern

  • Area of convergence

  • Velocity classification

Explanation

Question 8 of 17

1

The deposition of backward spatter produced by a gunshot wound is determined be:

Select one of the following:

  • The location of the injury

  • The size of the wound created

  • The distance between the victim and the muzzle

  • All of the above

Explanation

Question 9 of 17

1

If a murder victim's blood is found in the muzzle of a firearm:

Select one of the following:

  • No conclusion can be made

  • It can be concluded that the firearm is the murder weapon

  • It can be concluded that the firearm was present during the injury to the victim

  • It can be concluded that the owner of the firearm is the prepetrator

Explanation

Question 10 of 17

1

Which weapon would create cast-off patterns consisting of small droplets in a linear pattern?

Select one of the following:

  • Baseball bat

  • Knife

  • Wooden plank

  • All of the above

Explanation

Question 11 of 17

1

The pressure of the pumping of oxygenated blood out of an injury causes bright red-colored blood to spurt out and form a(n):

Select one of the following:

  • Void pattern

  • Expirated pattern

  • Arterial spray pattern

  • Both b and c

Explanation

Question 12 of 17

1

The removal of an object or surface that was located between the origin of blood and the target surface during the blodstain deposition leaves behind:

Select one of the following:

  • Expirated blood

  • A void

  • Blowback spatter

  • An undentifiable pattern

Explanation

Question 13 of 17

1

When an object with blood on it touches one that does not have blood on it, this produces a(n):

Select one of the following:

  • Flow

  • Indistinguishable pattern

  • Contact pattern

  • Trail pattern

Explanation

Question 14 of 17

1

Widely spaced bloody shoe prints with satellite spatter between the shoe prints were likely deposited by an individual who was:

Select one of the following:

  • Standing in place

  • Walking slowly

  • Running

  • Carrying a bloody weapon

Explanation

Question 15 of 17

1

The direction of a _______ may show movement of objects or bodies while the pattern was still forming or after the blood has dried

Select one of the following:

  • Flow pattern

  • Cast-off pattern

  • Bloodstain tail

  • Trail pattern

Explanation

Question 16 of 17

1

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:

Select one of the following:

  • The clotting ability of the blood

  • The blood type of the blood

  • The environmental condition of the scene

  • The method of deposition

Explanation

Question 17 of 17

1

The skeletonized perimeter of a bloodstain can be used to interpret:

Select one of the following:

  • The kind of force that produced the bloodstain

  • The time that elapsed between deposition of the stain and alteration of the stain

  • The source of the bloodstain

  • Both b and c

Explanation