On May 5, 2010, the Supreme Court of India struck down the use of so-called "truth drugs" and lie detector tests in criminal investigations. The court held that the involuntary use of narcoanalysis and polygraph tests "amount[ed] to an unwarranted intrusion into personal liberty," and that "no individual should be forcibly subjected to any of the techniques in question, whether in the context of investigation in criminal cases or otherwise." The court allowed for the use of these techniques on a voluntary basis but maintained that certain safeguards should be in place and that "the test results by themselves cannot be admitted as evidence because the subject does not exercise conscious control over the responses during the administration of the test."
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