The House Sitter — Peter Lovesey

The corpse of a beautiful woman, clad in only a bathing suit, is found strangled to death on a popular Sussex beach. When she is finally identified, it turns out she was a top profiler for the National Crime Faculty, who was working on the case of a serial killer. And though she was a Bath resident, the authorities don't want Detective Superintendent Peter Diamond to investigate the murder. How strange. What could they be trying to hide?