Senior Punjab Police officer Salwinder Singh, who was under investigation for a possible link with the Pathankot airbase attackers, was given a clean chit by the National Investigation Agency on Friday, reported PTI. The Superintendent of Police-rank officer was subjected to several rounds of questioning, along with a lie-detector test. According to the report, the investigative agency found nothing adverse against him following its examination.

The NIA suspected foul play after Singh was kidnapped, and later released, by the terrorists a day before they attacked the Pathankot airbase. Questions were raised about what Singh – who had been transferred from Gurdaspur only days before because of sexual harassment complaints from five female constables – was doing out so late in the night. The decision of the heavily armed terrorists to let Singh go, when they had reportedly earlier killed a taxi driver to use his car, also raised suspicions.

The NIA had raided Singh's home, but failed to find anything incriminating in the documents its officers found. The agency was also trying to ascertain whether he had any role in the drug racket operating in the bordering districts of Pathankot and Gurudaspur.