A necessary condition for obtaining a confession is for the person to believe incriminating evidence exists.
[ ] are the most obvious sources of information.
 analysis refers to the use of mapping technology to provide an array of information on the location of specific events.
A [ ] information systems (GIS) is a system that captures, stores, analyzes, manages, and presents data that is linked to location. Special reports and maps locating high criminal activity can be generated. Computer-generated maps can also provide investigators with an overall picture of the crimes that have occurred since they were last on duty.
The crime scene provides the major opportunity to locate physical evidence. The initial response should be regarded as the only chance to:
The reasons individuals furnish information to an investigator are only nefarious in nature.
Occasionally a fixed surveillance is conducted openly.
People normally see the features on a face in totality, unless one feature stands out.
Concerning court testimony, when  are projected, credibility is established. Which is not correct?
The polygraph’s principal contribution to criminal investigation is that it frequently leads to a confession.
When handling informants, investigators should keep the following in mind:
A visual observation is the least frequent source of information contributed by a witness.
[ ]may occur when a police officer (or an informant with official concurrence) beguiles an innocent person into committing a crime.
To be admissible in court, an item of evidence must be shown to be identical with that discovered at the crime scene or secured at the time of arrest.
Experienced detectives have learned that eyewitnesses can be mistake; indeed, it is uncommon to find various eyewitness reports on an identical event to be incompatible. It is the task of the investigator to resolve such contradictions.
Surveillance may be described as the obtrusive observation of a person, place, or thing.
Since computers are now commonly used in police work, their ultimatecontribution has been fully realized and used.
Basic motives for informing includes which of the following:
 applies to a suspect and suspect’s family, friends, or associates – people who are likely to withhold information or be deceptive.
The major source of recorded information are files maintained by governmental and business organizations.
Recording the activities of the first officer and investigator at the scene is best accomplished with notes kept on a chronological basis.
Problems concerning physical evidence can arise needlessly when it is presumed that a case will involve plea bargaining.
Regarding identification of evidence, any container must be sealed and initialed on the seal.
Because many informants still come from the underworld, the potential for corruption exists.
Which of the following is not part of forensic medicine?
Communication between people is limited to the spoken or written word.
The opportunity to learn of a criminal’s activities is never greater than when a close personal relationship between a criminal and an informant has fallen apart.
Fortunately, witnesses are often able to provide a serviceable description of a vehicle or a weapon used in a commission of a crime.
Law enforcement has not increased its’ attention to specific types of web sites and chat rooms to help identify pedophiles or child pornographers, as well as potentially violent groups.
The preliminary walk-through process helps define the boundaries of the areas to be examined.
Psychologists use the term unconscious  to describe a witness’ mistaken recollection about a crime – a recollection implicating an individual who was not involved.
Biological specimens, particularly blood and semen stains, are best preserved by
The courts have failed to side with the rights of individual informants to keep their identity confidential.
Trace evidence is present at many crime scenes, but is frequently overlooked despite its considerable potential.
 applies to victims or eyewitnesses who can reasonably be expected to disclose what they know. INTERVIEWING.
The ViCAP (Violent Criminal Apprehension Program) was set up by the FBI in 1985 to deal with  and other itinerant felons who commit violent crimes.
The use of bifocals, field glasses or the telescope to magnify the object of a witness’ vision is not a forbidden search and seizure, even if they focus without knowledge or consent upon what one supposes to be private indiscretions.
Responsibilities of the investigator include: determine whether a crime has been committed, locate and apprehend the perpetrator, testify effectively as a witness in court.
 is the study of poisons: their origins and properties, their identification by chemical analysis, their action upon humans and animals, and the treatment of conditions they produce.
Hypnosis is never a valuable tool.
 evidence is a criminalistics term; it describes physical evidence so small (in size or forensic details) that an examination usually requires either a stereomicroscope, a polarized light microscope, or both.
Evidence must be accounted for only until it is analyzed.
The question of whether a gun was recently fired can be decisively answered.
When considering curtilage which factors need to be considered?
 evidence is a nonlegal term which describes the aspect of laboratory work involving the concept of identity.
As long as people must supply facts to obtain or transfer any utility service, there is a reservoir of useful information in utility company files. The files of telephone companies are particularly useful.
Investigative questions to answer include: (Who, what, where, when, why and how).
The video recording of a crime scene is not an essential component of a crime scene documentation.
What is a common mistake investigators make when conducting interviews?