The National Investigation Agency (NIA), which is probing the Pathankot terror attack case, on Thursday conducted searches at five places, including the residences and office of Punjab Police SP Salwinder Singh and his friends.
The Gurdaspur office of the SP and residence of his jeweller friend Rajesh Verma, whose throat was slit allegedly by the terrorists after kidnapping them along with a cook, were searched by the NIA sleuths.
The development came after interrogation of Mr. Singh by the NIA for several days in Delhi.
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Amritsar Police Commissioner Jatinder Singh Aulakh said that the NIA team had sought assistance of the police.
A lie detector test on Mr. Singh was conducted on Wednesday by the NIA as part of the probe into the attack on Indian Air Force base in Pathankot.
He will also be subjected to behavioural tests.
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Sources said Mr. Singh is expected to be produced before a team of scientists soon. The panel will include a ‘behavioural analyst’ and ‘psychoanalyst’ who will give a scientific assessment of his personality.