The probe agency made the submission before Additional Chief Metropolitan Magistrate Shivali Sharma who directed it to expedite the investigation and file a final report.
"You (CBI) file a final report. Tell me how much more time you want to complete the probe. Its an endless process. You file a final report and I will consider it. Expedite the probe and also give me the time frame," the magistrate said.
CBI's Superintendent of Police, who is supervising the investigation, told the court that they are making all efforts to complete the probe and an official recently spoke to Narinder Singh, son of a prime witness against Tytler in Canada, but he has refused to join probe.
"As far as probe within India is concerned, it is almost complete. We have tried to call Narinder several times. He picked up our call the last two times but has refused to join the probe and come to India.
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CBI prosecutor N K Srivastava also said the agency was not hiding anything and has disclosed all facts to the court.
CBI had earlier claimed that they had made all possible efforts to trace Narinder but he could not be contacted as nobody was picking up his mobile when called.
On being asked by the court if Phoolka can convince
Narinder and bring him to India to join the probe, the counsel replied in negative saying he was not in his control.
The court, however, refused to direct CBI to give such letter written by it to other authorities to the counsel and said it cannot provide copies of letters to them at this stage.
The court had earlier pulled up CBI for delaying in communicating with Canada for help in tracing Narinder.
The case pertains to riots at Gurudwara Pulbangash in North Delhi where three people were killed on November 1, 1984, a day after the assassination of then Prime Minister Indira Gandhi.
CBI had re-investigated the case of killing of Badal Singh, Thakur Singh and Gurcharan Singh near the gurudwara after a court in December 2007 refused to accept its closure report. CBI has filed three closure reports in the case.
Tytler has denied any role in the riots.