Respond to one of the following:

Option 1. You are investigating a hit-and-run accident and have identified a suspect vehicle.  Describe how you would collect paint to determine whether the suspect vehicle was involved in the accident.  Be sure to indicate the tools you would use and the steps you would take to prevent cross-contamination.

Option 2: Describe in detail the Mass Spectrometry process.

Option 3: Gas chromatography is one of the basic analysis procedures for the crime lab.  Describe in detail the process and the theory upon which it is based.

Option 4: Below is a series of questions about drugs or drug use. For your original posting, answer one question that has not been answered by anyone else yet by identifying which question you are answering by number. 

Q1. Following are descriptions of behavior that are characteristic among users of certain classes of drugs. For each description, indicate the class of drug (narcotics, stimulants, and so forth) for which the behavior is most characteristic.

     1. slurred speech, slow reaction time, impaired judgment, reduced coordination
     2. intense emotional responses, anxiety, altered sensory perceptions
     3. alertness, feelings of strength and confidence, rapid speech and movement, decreased appetite
     4. drowsiness, intense feelings of well-being, relief from pain

Q 2. Following are descriptions of behavior that are characteristic among users of certain classes of drugs. Name at least one drug that produces the described effects.
     1. slurred speech, slow reaction time, impaired judgment, reduced coordination
     2. intense emotional responses, anxiety, altered sensory perceptions
     3. alertness, feelings of strength and confidence, rapid speech and movement, decreased appetite
     4. drowsiness, intense feelings of well-being, relief from pain

Q 3. Following are descriptions of hypothetical drugs. According to the Controlled Substances Act, under which drug schedule would each substance be classified?

     1. This drug has a high potential for psychological dependence, it currently has accepted medical uses in the United States, and the distributor is not required to report to the U. S. Drug Enforcement Administration.
     2. This drug has medical use in the United States, is not limited by manufacturing quotas, and may be exported without a permit.
     3. This drug must be stored in a vault or safe, requires separate records keeping, and may be distributed with a prescription.
     4. This drug may not be imported or exported without a permit, is subject to manufacturing quotas, and currently has no medical use in the United States.

Q 4. Figure 12-11 on page 305 shows a chromatogram of a known mixture of barbiturates. Based on the figure, answer one of the following questions.

     1, Which barbiturate detected by the chromatogram had the longest retention time?
     2. Which barbiturate had the shortest retention time?
     3. What is the approximate retention time of amobarbital?

Option 5:  Answer the following questions about driving risk associated with drinking and blood-alcohol concentration.

1. Randy is just barely legally intoxicated. How much more likely is he to have n accident than someone who is sober?
2. Marissa, who has been drinking, is 15 times as likely to have an accident as her sober friend, Christine.  What is Marissa’s approximate blood-alcohol concentration?
3. After several drinks, Charles is 10 times as likely to have an accident as a sober person. Is he more or less intoxicated than James, whose blood-alcohol level is 0.10?
4. Under the original blood-alcohol standards recommended by NHTSA, a person considered just barely legally intoxicated was how much more likely to have an accident as a sober individual?

Option 6: Following is a description of four individuals who have been drinking. Rank them from highest to lowest blood-alcohol concentration.

1. John, who weighs 200 pounds and has consumed eight 8-ounce drinks on a full stomach.
2. Frank, who weighs 170 pounds and has consumed four 8-ounce drinks on an empty stomach.
3. Gary, who weighs 240 pounds and has consumed six 8-ounce drinks on an empty stomach.
4. Stephen, who weighs 180 pounds and has consumed six 8-ounce drinks on a full stomach.

Option 7: You are investigating an arson scene and you find a corpse in the middle, but you suspect the victim did not dies as a result of the fire. Instead, you suspect that the victim was murdered earlier, and that the blaze was started to cover up the murder. How would you go about determining whether the victim died before the fire?

Option 8: A forensic analyst at the local crime lab receives pieces of a disfigured bullet from a crime scene. She then obtains an example bullet fired by the firearms analyst from the suspect’s firearm. What is the next step in the analysis?

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