Murdochs to appear before British parliament

>>> media mogul rupert murdoch and his son james have bowed to pressure. they will appear before parliament on the hacking scandal. rebecca brooks agreed to testify but the murdochs initially balked. some u.s. lawmakers are also calling for federal investigations into allegations news corp journalists hacked into the voice mail accounts of september 11th victims. senator robert menendez , a new jersey democrat, wrote to attorney general eric holder saying the possibility this happened is quote, horrifying. republican congressman peter king of new york described the alleged hacking as unjustifiable and parasitic. has news international responded to the 9/11 allegations?

>> yes, they have. it's really important to point out that this stems from a report in a tabloid article last sunday here in the uk. in that report there was an unnamed source that spoke to an unnamed former police officer who alleges that he was approached by "news of the world" to tap the victims' phones from 9/11 and he said he denied it. very, very thin but it has gained some traction and that's why we're seeing u.s. lawmakers talking about it. when i spoke with news international this morning, they had this to say. they said news international has seen no evidence to support these allegations. so clearly, they are denying at this point.

>> stephanie, i know there has been another arrest here. we're talking about somebody who has been taken into custody. how far is this investigation going to go? are experts saying how many people they expect to have to face consequences for this?

>> the head of the investigation for scotland yard told parliament this week that this investigation is ongoing and it's going to grow. she expects it to widen. there is no limit to it at this point. she did allude to the fact there could be more arrests. the arrest this morning was a 60-year-old former editor of "news of the world." his name is neil wallace. he was also the deputy to andy colson, who was arrested last weekend, a spokesperson for prime minister cameron. there's a lot of interest around his control of the paper and what it did while he was its steward.

>> we were just showing new jersey senator frank lautenberg there, who has gone so far as to say look, news corp is an american corporation and could actually face consequences based on american laws, no matter where the crime allegedly happened. we'll have to wait and see how that plays out. stephanie, thank you.