The person give information for the good of his community who is interested in seeing that justice is done.

• Vanity

• Civic-mindedness

• Anger

• Repentance

The person who usually engaged in criminal activities to earn a living would like to eliminate his rival in the criminal business.

• Competition

• Vanity

• Repentance

• Aviodance of punishment

The person who is apprehended in the commission of a minor offense and seeks to be prosecution by revealing information concerning a major crime.

• Revenge

• Anger

• Avoidance of punishment

• Civic -mindedness

This methods of identifying depends on the ability of the witness to describe the person seen committing the crime.

• Artist assistance

• General photograph

• Rogue's gallery

• Verbal description

Method of identifying criminal through sketches must be employed to help the witness draw a picture of the criminal.

• Artist assistance

• Rogue's gallery

• General photograph

• Verbal description

The witness maybe taken to the photo laboratory to examine the photograph files of known criminals.

• Artist assistance

• Police line up

• Rogue's gallery

• Verbal description

These are criminals whose pictures are available from police files and records.

• Known criminal

• Unknown criminal

• wanted criminal

• criminal with warrant

These are criminals whose identification is furnished by eyewitnesses only.

• Known criminal

• Wanted criminal

• unknown criminal

• Criminal with warrant

It is a direct acknowledgement by the accused in a criminal case of the truth of his guilt as to the crime charged or of some parts of the commission of crimes for which he is charged.

• Admission

• Confession

• Information

• Interrogation

It is the statement of facts by the accused in a criminal case which do not directly involved the acknowledgement of guilt in the commission of crimes for which he is charged.

• Confession

• Instrumentation

• Admission

• Interview