Explain how the analysis of trace elements was important to the investigation of the assassination of President John F. Kennedy.
What will be an ideal response?
Bullets recovered from Kennedy’s brain, the wrist of Governor John Connally, and the car in which both were riding at the time of the assassination were found to have almost identical concentrations of the trace elements silver and antimony. This supports the conclusion that the bullets that struck Kennedy and Connally were fired by the same shooter.
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Which of the following is not a component of information warfare?
a. Psychological operations b. Physical destruction c. Propaganda d. Security measures
Police power to arrest the homeless is often limited by:
a. Ingenuity of the police to find a reason to arrest b. Curt rulings and local ordinances or state statutes c. Indifference of the police to the homeless problem d. Homeless shelters suing many times in the aftermath of an arrest
Nearly all sheriffs' departments provide basic law enforcement services and investigate crimes. Many sheriffs' departments also maintain:
a. state sex-offender registries. b. the county courts. c. the county jail. d. automated fingerprint identification systems.
When neither the subjects nor the researcher can identify which group is the control group and which is the experimental group, the design is said to be:
a. cross-sectional b. double-blind c. a blind experiment d. of no value