A senior police superintendent accused of conspiring to supply false documents to the Immigration Department told a court yesterday he had never authorised the use in a visa application of a letter signed by him. Brian John Heard, 56, the former chief of the Forensic Firearms Examination Bureau, said he was not aware that a friend, Peter John Coomber, 47, and Mongolian Gonchigsuren Odsuren, 36, had sent the letter as part of an application for a working visa for Odsuren. Heard told the District Court he only learned about the matter when the Immigration Department faxed him the letter, asking him to confirm the application, in April 1999. When asked by his barrister, Peter Cosgrove, Heard said he had presumed the standard letter was to support a visa application for a Beijing woman who had previously done translation work for him. Heard, Coomber and Odsuren deny a joint charge of conspiracy to furnish false representations to an immigration officer. They are accused of falsely claiming Odsuren was to be employed as a technical author and interpreter at OED Ltd between October 5, 1998, and May 10, 1999. OED, of which Coomber was the director, supplies equipment for examining firearms to the Hong Kong police force. The prosecution has told the court it was claimed Odsuren was fluent in Mongolian, Russian and English and was needed as an interpreter for a project between OED and the Hong Kong police. After the Immigration Department rejected an employment visa for Odsuren on February 4, 1999, Coomber sent another eight days later and attached a letter signed by Heard. The prosecution says the letter, which carried the Forensic Firearms Examination Bureau letterhead, stated Odsuren's expertise could not easily be found in Hong Kong. Heard is to continue his testimony today before Deputy Judge Peter White.