Border Security Force (BSF's) pilot Wing Commander (retd) JS Sangwan, who is facing criminal charges for impersonating his senior to fly the incumbent Union Home Minister Amit Shah's plane, has tendered resignation from the services.Sources in the BSF said that Sangwan had filed his resignation in the first week of September which cannot be accepted as he has a pending, ongoing departmental enquiry against him."Till the time his enquiry is pending, the decision on his resignation cannot be taken," a senior BSF official said."The accused pilot had asked few questions which have been addressed appropriately by BSF," another BSF official claimed.Sangwan, who was posted in the BSF air wing is a Kargil war veteran.Sources in BSF claimed that accused pilot has submitted a petition seeking voluntary resignation from the services with effect from October 31. He had sent the petition twice, first on September 2 and then on September 16.According to reports, throughout June and July, ...