However, no link between him and Lawrence Bishnoi or any other local gang has come to the notice during investigation so far, he added. Jodhpur police officials said a case had also been registered against Bishnoi at Mansa s Sadar police in Punjab on March 24 for sending a similar threatening mail to the father of slain Punjabi singer Sidhu Moosewala. Salman Khan Death Threat: Mumbai Police Apprehends Man from Rajasthan For Sending Threat Email.