According to the Bihar Police, who started investigating the Sushant Singh Rajput death case after his father lodged an FIR in Patna none of the late actor's sim was registered in his own name. Before this Mumbai police revealed that he had changed his SIM card several times in the last few months. Bihar Police revealed that one of the sims was registered in the name of his friend Siddharth Pithani. Bihar police are now tracking the call details. The Bihar Police is also investigating the mysterious death of Sushant Singh Rajput's former manager Disha Salian. Disha died on June 8, six days before the actor's death in 14th June.