Answer:
concealed knowledge test
Step-by-step explanation:
The procedure of questioning a crime suspect person who is attached to a lie detector and the police is questioning only that part of the crime known to both the law breaker and the police officer is called as concealed knowledge test.
The concealed knowledge test is also know as Concealed Information Test or the CIT. It is almost similar to the traditional polygraph test. This test is a not a test of emotion but a test of recognition.
This test is easy to set and easy to score. It is the most important technical device that the examiner can use.
Thus the answer is "concealed knowledge test".