Detective Chief Inspector April Casburn was today jailed for 15 months at the Old Bailey after being found guilty last month of misconduct in public office for offering to sell information to the News of the World.
Casburn, 53, had been warned that a jail term was likely despite the fact that she is in the process of adopting a child.
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It is claimed that both police and security services, including MI5, have been prevented from vast pools of data on the social media site.