Does anybody know the EU law on deportating dangerous criminals?

Following the latest blocking of the deportation of Chindamo, this article suggests that the Italians are looking to deport 100 Romanians:

Later, the Italian government issued a decree to deport all "dangerous immigrants" to their home countries, in line with a European Union directive on security.

So, is this just empty rhetoric to calm a baying crowd or does the Italian government know something about EU law that our dear old Mr Justice Collins doesn't?

I don't know the answer, but it does raise questions about the interpretation and application of these pan-EU laws.

NB. Nice to see the Italians still have a sense of humour:

Walter Veltroni, the mayor of Rome, said: "Before January 2007 Rome was the safest big city in the world. In the first seven months of the year, 75 per cent of arrests for murder, rape and robbery have been Romanians".

I guess if you don't include pickpockets and robbery in your statistics then Rome probably is a pretty safe place...