Mahatma Gandhi's grandson Tushar Gandhi on Monday opposed any re-investigation into the assassination of the Father of the Nation but the Supreme Court questioned his locus standi.The querry from a bench headed by Justice S.A. Bobde came as senior counsel Indira Jaising told the court that she was seeking to intervene on behalf of the Mahatma's grandson.To which, Jaising questioned the locus standi of the petitioner seeking the reinvestigation.Jaising said that the assassination of Mahatma Gandhi cannot be re-investigated after 70 years. She said that this was a basic criminal law.However, the court adjourned the hearing by four weeks as amicus curiae Amrendra Sharan told the court he has got some documents from the National Archive but not the entire lot.