An interesting pdf article on it from back in 2011 from Dr. Pielke jr.
http://sciencepolicy.colorado.edu/admin/publication_files/2011.36.pdf
That is the first reporting in English I see that reports this:
The deputy chief and scientists held a short one-hour meeting and then a press conference, during which they downplayed the possibility of an earthquake. For instance, De Bernardinis went so far as to claim that the recent tremors actually reduced earthquake risks: "The scientific community continues to confirm to me that in fact it is a favourable situation, that is to say a continuous discharge of energy." When asked directly by the media if the public should sit back and enjoy a glass of wine rather than worry about earthquakes, De Bernardinis acted as sommelier: "Absolutely, absolutely a Montepulciano doc. This seems important."
Which is the real thing they have been accused of. Not failure to predict a earthquake, but the attempt to predict the future absence of one, with terrible consequences.