The only person who wasn't completely satisfied with the police investigations into the death was the Coroner, Mr F.E.Cox, who quizzed the police thoroughly before he handed down his decision. Mr Cox listened as police told him that the body was naked except for a pair of socks and that there was no reason why they should suspect foul play.
Police told Mr Cox that fingerprints had been taken and they failed to match up with anyone on record. The Government Medical Officer testified that there were no broken bones and that death had occurred at least a fortnight before he examined it.
What Mr Cox wasn't told was that police didn't find it unusual that the singlet found alongside the body had dozens of knife cuts in it and that there were large bloodstains on the floor and on a mattress in the apartment above the shop.
Even without the knowledge of these incredible police oversights Mr Cox wasn't convinced and returned an open verdict and said: "It seems extraordinary that the body of Mr Brennan should have been found in the position and in the condition in which it was found. According to the evidence, the deceased had neither his trousers on, nor his boots, or shoes, or singlet. He was clad only in his socks, with his coat and trousers alongside him. Nothing was found to indicate to any degree of certainty that the deceased had taken his own life, even if it were his intention to do so. It seems to me an extraordinary thing that the deceased should have gone under the house to commit an act that would result in his death. It could have been that the deceased was the victim of foul play, although the police report said there was nothing to indicate foul play. But I cannot altogether exclude that possibility."
When his workmates at the PMG read of the unfortunate demise of their old workmate in the death notices they collected for a wreath and attended the small memorial service conducted by a local funeral director.
In arguably the most extraordinary circumstances in Australian criminal history, William MacDonald, the man who had committed five atrocious murders, was a free man if only he had known it. And if he had never gone back to Sydney he may well have been a free man to this day.