The DDI was in charge of the CID in each police division. He was usually assisted by one or two Detective Inspectors and a number of Detective Sergeants and Detective Constables. He was largely autonomous on his "patch", answering only to the divisional Superintendent and only calling in support from Scotland Yard for very serious crimes such as murder. DDI was an important stepping stone in a detective's career, with many top detectives getting their best experience when they were DDIs.
The rank disappeared in 1949, when it was regraded to Detective Chief Inspector. In 1953, it was regraded again to Detective Superintendent Grade I, and is thus equivalent to a modern Detective Superintendent.
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Last updated on Wednesday June 27, 2007 at 05:28:46 PDT (GMT -0700)
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