Verma on Friday had moved a city court accusing a forensic lab of defending Tytler during his lie-detector test.
In his complaint submitted to south Delhi's Mehrauli police station, Verma has said that he received an "extremely dirty and threatening email" late last night on his company's general email address.
Police said that they have registered a case under section 507 (Criminal intimidation by an anonymous communication, punishable with a term of two years) of the Indian Penal Code and are investigating the matter.
He alleged that the sender has furnished exact details of his residential address and the cars driven by him and his wife and has threatened to kill him and his family.
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Verma, who currently has three personal security officers providing him security as per the Delhi High Court's directions, demanded that his security be enhanced.
The court had on the last date put up the matter for hearing on October 30 when the CBI will also provide a status report on the test.
The case pertains to the 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.
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