Police allege a 74-year-old engineer murdered his wife at their home in
   the Sydney suburb of Bronte. (Bianca De Marchi/AAP PHOTOS)
   Police allege a 74-year-old engineer murdered his wife at their home in
   the Sydney suburb of Bronte. (Bianca De Marchi/AAP PHOTOS)

   A well-to-do civil engineer from Sydney's eastern suburbs allegedly
   gave police a detailed account of killing his wife as they arrested
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   The property in the beachside suburb remained cordoned off the morning
   after the death, with numerous detectives and uniformed officers at the