<P> Death of an Expert Witness is an Adam Dalgliesh novel by P.D. James, published in 1977 . It begins with the discovery of a murder of a young girl . However, this is not the focus of the novel, but rather is used as a method to introduce the reader to the staff of a forensic laboratory, the background of this mystery . The actual murder of Dr. Lorrimer, an experienced expert witness, is only discovered in the second section of the book . It is quickly established that only people associated with the lab would have the opportunity or the knowledge to commit the crime, which allows the detectives to focus their attention . </P> <P> Scotland Yard's Adam Dalgliesh investigates the murder of forensic biologist Dr. Edwin Lorrimer . With too many motives and no physical evidence, Dalgliesh is left to deduce which among the small pool of suspects is the killer, who decides to claim a second victim . </P> <P> The events take place in Hoggatt's Laboratory East Anglia, which is near Cambridge . </P>

Where was death of an expert witness filmed