The article says: "A lawyer for the police revealed during the court hearing that they were launching a criminal investigation after examining some of the material."

I wonder what crime they believe that Miranda might have committed? This reminds me that it is illegal, in the UK, to collect or possess "information of a kind likely to be useful to a person committing or preparing an act of terrorism" [1]. Perhaps this case will show us how far this offence can be stretched.

[1] http://en.wikipedia.org/wiki/Terrorism_Act_2000#Section_58_....