http://www.theherald.co.uk/news/61969.html
Lucy Admas
The demand for the "thin grey line" is now so great the Home Office is planning a national system to tap a vast reservoir of veteran officers. Chief constables have also created full-time teams of former detectives to reopen old cases. The scheme costs forces from £80 to £500 a day, depending on the rank and experience of the retired officers, but they save on overheads and profit from experience.
