Ii. tracing
a great part of investigative work is devoted to "finding" missing or wanted persons. the solving of a case frequently depends upon locating the perpetrator. the proper presentation of a case in court involves the discovery and identification of witnesses. the search for a person is fre¬quently a simple matter of a few telephone calls or a visit to a house. at other times, however, the hunt (поиски) can become a lengthy and com¬plicated ordeal.
the search for persons commonly requires a search of records and an application of various sources of information. the term "tracing" is used here to describe all of these procedures. a patient study of records and the information from officials are often necessary to obtain additional evi¬dence and to locate or to identify a person.
unofficial sources of information such as confidential informants are often used by investigating officers.
(o'hara. fundamentals of criminal investigation)

вопросы к тексту:

1. what phases is the investigation usually divided into?
2. are the three phases necessarily separated in time?
3. what does the identification of the criminal mean?
4. in what way is the identity of the criminal ordinarily discov¬ered?
5. what does primarily the problem lie in if the criminal is un¬known?
6. what must be done to prove the guilt of the accused?
7. what is the great part of investigative work devoted to?
8. what does the proper presentation of a case in court involve?
9. why are a patient study of records and the information from of¬ficials very often necessary for investigating officers?
10. are unofficial sources of information used by investigating of¬ficers?