Then that works well for the defense in substantiating a police set up.
Richard Owen was simply recording what he was told by an accepted "reliable source".
But
that's the nub of the problem. Owen may have been reporting what he was told by an authority figure. But whoever that figure was, (s)he was telling Owen falsehoods. Owen patently made no effort to cross-check or verify the information he was being told - after all, if he had done so, he'd have discovered it was at best unverifiable and at worst completely false (which is in fact what it was).
Newspaper reporters - particularly lazy ones - are renowned for their propensity to swallow and regurgitate things told to them by "official sources" without even trying to check for accuracy or reliability. There are three main reasons for that:
1) There is a misguided belief that official sources are generally accurate and truthful;
2) Official sources tend to be useful to journalists on an ongoing basis, so many journalists try to cultivate good working relationships with such sources, in the hope that this will pay dividends in the future. And it should be rather obvious that an excellent way to cultivate a good relationship is to uncritically print whatever the source wants them to print (a big hello to Andrea Vogt and Barbie Nadeau is also in order here!);
3) Perhaps most importantly, a reporter and his/her publisher can be extremely confident that they will have full legal protection if they report something that's been supplied by an official source. If their reported facts face legal challenge from any quarter, they can safely say that they were only reporting what they'd been told by an official source.
Of course, if an official source is feeding a reporter information that's salacious, sensational and provocative, the reporter may feel that (s)he has hit the jackpot: the reporter now has legally iron-clad permission to report all of this salacious/sensational information, and what's more, it can be shown to have had some form of official endorsement. And savvy authority figures with an agenda know this full well, of course. Hello Dr Mignini!