Federal prosecutors in the United States on Wednesday (November 29) charged an Indian national for his involvement in a failed assassination attempt on Khalistani leader and designated terrorist Gurpatwant Singh Pannun on American soil. The man has been identified as the 52-year-old Nikhil Gupta.Federal prosecutors in the United States on Wednesday (November 29) charged an Indian national for his involvement in a failed assassination attempt on Khalistani leader and designated terrorist Gurpatwant Singh Pannun on American soil. The man has been identified as the 52-year-old Nikhil Gupta.