It is worth reminding ourselves why Green’s computer was siezed in the first place.
// Sir David Normington, the Permanent Secretary at the Home Office who had seen many leaks in his time, was a worried man. He feared a Home Office official was "deliberately and maliciously leaking material for political purposes". He was right.
Christopher Galley, 26, a would be Tory MP who worked in the Home Office, had secretly written to the Tories in May 2006 offering documents which he said would expose the chaos in the Government's immigration policy.
Damian Green, the shadow immigration minister, became the Tory link man with Mr Galley. Over the next two years there were 20 leaks designed to undermine the authority of Britain's first woman Home Secretary. They included the accusation the Home Office feared a sharp rise in crime during the coming recession. Mr Green was yet again running rings round government ministers.
On November 19 2008 the police questioned Mr Galley [a Home Office Civil Servant] and over the next 17 hours it became clear that he had regularly supplied [leaked documents] to Mr Green. //
http://www.telegraph.co.uk/news/politics/5165813/Damian-Green-scandal-How-a-ministers-frustration-led-to-the-arrest.html