It's accepted by everyone that the police changed stance. All be it very quickly, after just one month.
Supporters jump on the relatives apparently expertly fabricating a silencer, virtually straight after the massacre. Or Julie telling multiple horrendous lies because, according to Bamber, he jilted her.
Quite why the police were supposed to have changed stance and put themselves into a very hot frying pan remains unclear. Allegations that the relatives pressurised them or that they tried to cover up the fact they shot Sheila are totally unconvincing.
But did the police change stance at all ?
The media were all over the massacre straight away, for a couple of days. Stating Sheila had massacred her family and then killed herself. The police had to say something to the press and all they could do is go along with what Bamber told them. Or maybe the police said nothing at all.
The murder/suicide theory was then promoted by the media rather than by the police.
Several policemen were suspicious of Bamber straight away. Stan Jones doing tests on the rifle & Bews saying Bamber was too willing to offer information insinuating Sheila. Supported by the equally suspicious relatives. Bamber didn't help himself by going on multiple jolly ups. The forensic crime scene and circumstantial evidence had yet to be collected, processed and digested. Which included the silencer.
Bamber was interviewed, charged and admitted to the caravan break in. Which would have just made him more of a suspect for the massacre.
Julie also came forward after just one month, after confiding to 5 people beforehand. Stan Jones saying he was going to approach her again anyway. Bamber was charged with the massacre when returning from another jolly up abroad. The silencer evidence, together with a mountain of other forensic and circumstantial evidence had now been processed.
The police charge was successful and Bamber was convicted and has failed with several appeals.
Seems to me that the police didn't really change stance at all. They simply spent a month processing evidence while the media incorrectly hyped up Sheila as a crazy, guilty woman.