Investigation
It was obvious that both had died from some sort of poisoning. At the scene were signs of vomit and excreta. Excreta from both victims along with items of clothing were found on the exposed bed of the river. Because New Year's Day was a public holiday, forensic examination of the bodies was delayed for 36 hours. When forensic examination did take place, no traces of any poison could be found.
The case attracted instant publicity. It involved a high-society party, alleged wife-swapping, an unidentified third person at the death scene, and an unidentified poison. There was also speculation that Bogle was involved in research important in the Cold War.
The inquest in May 1963 did not help to resolve the mystery. The coroner, Mr J. J. Loomes, concluded that Bogle and Chandler had died because of "...acute circulatory failure. But as to the circumstances under which such circulatory failure was brought about, the evidence does not permit me to say." In other words, he stated that Bogle and Chandler died either because their hearts stopped beating, or they stopped breathing.
Read more about this topic: Bogle-Chandler Case