Commentary from the Guardian:
. . . some Republican Congress members like Congresswoman Mary Bono Mack (Republican, Florida) initially satisfied with NewsCorps assurances that the problems were confined abroad. That is until the 9/11 Parents and Families of Firefighters & World Trade Center Victims came out in favor of an investigation into whether they were hacked. With that, House homeland security chairman Peter King (Republican, New York) proved himself far less likely to rely on News Corp's statements alone and called for an investigation, given his constituents' close connections to 9/11 and his own reputation as their biggest defender in Congress.
King, a frequent guest on Fox News programs whose hearings on Muslim radicalisation earlier this year garnered him more than a fair share of criticism on every other network, was apparently the last crack in the proverbial dam at the Department of Justice, which announced only a day later that they were beginning a probe into whether News Corp. employees attempted to hack 9/11 victims' phones or records.
By the way, how does a Murdoch owned paper cover this story?