He has also faced scrutiny for using detectives to investigate an auto accident involving his wife, Carol, and to guard his daughter's wedding.

Denver police officers were also found to have used undercover detectives to instigate violence against police during the 2008 Democratic National Convention.

"I was aware that the News of the World used private detectives, as every paper in Fleet Street did."

Christie wrote many other mystery stories, using several different detectives but Barzun and Taylor chose to review these only.

The department will also call commanders to police headquarters each week to report on their progress and will use undercover detectives at banks it considers vulnerable.

Nick Davies then accuses Stenson of using private detectives.

She could do without a powerful, handsome French stepbrother, especially one who had used private detectives to find her.

Mohan adds that Sun journalists are allowed to use legitimate "search agents", but can only use private detectives with the approval of the chief executive officer.

You said you used private detectives before, Ollie.

Some lawyers who handle cases entailing substantial property settlements are using detectives to shadow spouses whose sexual behavior places them at high risk of the disease.