Death of an Expert Witness is the story of Adam Dalgliesh, an officer of Scotland Yard who must investigate one of their own forensics labs after the death of expert witness and forensic scientist Dr. Lorrimer. Dalgliesh is out of his element among the scientific trappings of the lab, and the small suspect pool makes for a tense investigation, but eventually he is able to ferret out the truth though old-fashioned police trickery.
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