The nation’s biosecurity system of checking seed imports at the border is being manipulated, says a former secretary of the Justice Department. David Oughton, who was called in to run an inquiry into how two consignments of seed contaminated with genetically engineered seed entered the country late last year, said yesterday the manipulations were not from any ulterior motive ”but merely to clear the records”. He said biosecurity computer records showed 30 corn consignments during the past 12 months with incomplete records.