But on Monday (August 10), Special Judge (Fast Track Court) Ajay Gupta of the Rouse Avenue Court in New Delhi rejected the plea. The CBI had also submitted before the court that their plea for undergoing the tests was not maintainable, as the chargesheet had already been filed. What does the law say about lie detection tests? “The compulsory administration of any of these techniques is an unjustified intrusion into the mental privacy of an individual. As the subject is unconscious while the responses are given, the test results themselves cannot be treated as substantive evidence of guilt.