Labour MP Chris Bryant has led a rare emergency debate in the Commons, with MPs from all parties condemning the latest allegations of phone-hacking at the News of the World.
On 6 July 2011, Mr Bryant said that Rebekah Brooks should resign from her current post as News International chief executive after editing the News of the World during a period in which the paper "completely lost sight of any idea of decency".
Mr Bryant complained that Parliament had been "systematically" misled as it tried to uncover evidence on phone-hacking.
A "very dirty smell" also surrounded the police's handling of the original inquiry, he added, describing the "closeness" of the Met and the News of the World.
"In addition, I am told that police are looking at not just Milly Dowler's phone and those of the families of Holly Wells and Jessica Chapman, but the case of Madeleine McCann and 15-year-old Danielle Jones who was abducted and murdered in Essex in 2001 by her uncle Stuart Campbell," he continued.
Mr Bryant emphasised that he did not believe that the News of the World was "the only magician in the dark arts", and he blamed the "whole of the political system" for failing to tackle the problem earlier.
Mr Bryant argued that politicians had "colluded for far too long with the media".
"We rely on them, we seek their favour, we live, we die politically because of what they write and what they show and sometimes that means we are not courageous or spineful enough to stand up when wrong has occurred," he said.
Attorney General Dominic Grieve noted that the Prime Minister agreed earlier that "there would be a fully independent public inquiry or inquiries into these matters".
But he said any such inquiry would not be allowed to jeopardise the ongoing police investigation and was unlikely to take evidence from witnesses until detectives completed their probe.
Shadow home secretary Yvette Cooper said MPs should "of course" not prejudice the police investigation and any potential trials.
"But we can say very loudly and very clearly that the very idea of targeting victims and their families in their darkest hour is shameful, sickening and cruel," she said.