As I recall the PJ never accused the McCanns of killing anyone, so that statement is false.
In the end, when challenged, the newspapers were unable to defend their actions and paid the McCanns half a million in damages. That means they did not have impeccable sources. The PJ were not the source of some of their stories;
Additional examples were given including stories that Madeleine had been "sold" to ease financial burdens and that the McCanns were involved in "swinging" or "wife-swapping orgies".
https://www.theguardian.com/media/2008/mar/19/pressandpublishing.medialaw
Please remember to indicate when you are expressing your opinion and your interpretation of events which with all due respect you know absolutely nothing about.
I recommend that rather than using the paraphrased accounts of newspapers you find a version of the actual evidence presented to the Leveson Inquiry.
For example ... arising from David Pilditch's sworn testimony ...
12.19pm: Jay says a further Express story reporting DNA "findings" that Madeleine's body had been in the spare tyre-well in the boot was also inaccurate.
The DNA evidence was "at best inconclusive", says Jay. He refers to the testimony of the McCann's four weeks ago who said it was "simply untrue" .
"Madeleine's DNA was not uncovered in the hire car," Jay points out.
Pilditch says
"we know that now, but we didn't know that then" adding the local police were briefing that there were links. ////////
12.59pm: Sherborne wants to put it on record that there is nothing in the police files to suggest that Madeleine's DNA was found in a car referred to in one of Pilditch's articles.
Leveson explains he is conducting an investigation into press ethics but is happy to put it on record that this is indeed the case.
Everybody is agreed that there is absolutely no foundation at all for the allegation that emerged throughout the press at this time that Dr and Dr McCann were involved in any way, in any inappropriate conduct in relation to the disappearance of their daughter.
https://www.theguardian.com/media/2011/dec/21/leveson-inquiry-james-hipwell-live#block-62The question arises as to why the Portuguese police leaked that particular story?