Bihar Police's investigation into actor Sushant Singh Rajput's death was "quarantined (and) obstructed", Vinay Tiwari, the IPS officer isolated by Mumbai authorities in line with COVID-19 protocols relating to inter-state travel, said Friday as he was released and allowed to return to home.Mr Tiwari will now leave for Patna this evening, according to news agency ANI."I would say I wasn't quarantined. The investigation was quarantined. Investigation of Bihar Police was obstructed," Mr Tiwari, whose release had been requested by the Nitish Kumar government, told ANI.