The case of Dr Bogle and Mrs Chandler is being assessed by the NSW State Coroner, due to sensational new evidence uncovered by documentary film maker Peter Butt.
In the film, Who Killed Dr. Bogle and Mrs Chandler, which screened recently on the ABC and watched by almost 2 million Australians, Peter Butt claimed to have solved the 43 year old mystery surrounding the deaths of scientist Dr Gilbert Bogle and his lover Mrs Margaret Chandler.
The film included startling new evidence that suggested the pair had not been murdered but rather died from breathing in a large amount of Hydrogen Sulphide.
But could Hydrogen Sulphide really have killed them? And, could such a tragedy happen on the banks of the Lane Cove River today?
Tonight, Catalyst presents new eye-witness accounts as both environmental and forensic scientists put a film maker’s claims under the microscope.
Narration: The tranquil waters of the Lane Cove River have a history of abuse, neglect and horrendous pollution.
For forty years this mistreated river has been holding a secret, one that could solve one of Australia’s most baffling murder mysteries.
Peter Butt: What really surprised me was that no one had gone down that track.
Narration: On New Year’s Day 1963, Dr Bogle and Mrs Chandler were found dead in a renowned lover’s lane than ran beside the Lane Cove River.
Dr Bogle lay partially undressed on the river bank, while Mrs Chandler was found 15 metres away on the river bed, naked from the waist up.
There were no signs of physical violence, and no cause of death was ever established.
The case remains officially unsolved, captivating curious locals like documentary maker Peter Butt.
Peter Butt: I’d been collecting information for over 20 years on the case. I grew up near the Lane Cove river. So it was always part of the background of growing up in Sydney. And anyone who was around in the 1960’s could not have missed the Bogle-Chandler case. I suppose I was attracted to it like everybody else.
Narration: Unlike everybody else, Peter had a suspicion about how Dr Bogle and Mrs Chandler died and his recent film made startling claims surrounding the deaths.
Peter Butt: What struck me was that they died near a mangrove. My schoolboy science came into play, where I’d learnt in school that mangroves give off gases. One of those gases was hydrogen sulfide.
Narration: Peter’s research told him mangroves don’t give off enough gas to be lethal, but in a dusty corner of the Lane Cove library, Peter stumbled upon one of the river’s long lost secrets: another more lethal supply of hydrogen sulfide in the river.
Peter Butt: Here it was, and it wasn’t only in excess, it was in dangerous quantities.
Narration: He found a report published just 15 years before Bogle and Chandler’s death that pointed to a starch factory on the river dumping half a tonne of sulfurous waste and organic matter in the river every week.
Peter Butt: Further up the river towards the weir that had been built in the late 1930’s, that’s where it was most concentrated. The tide pushed the waste up the river, hit the weir and stopped. And where Dr Bogle and Mrs Chandler died was right in that spot.
Narration: Bacteria in estuaries like the Lane Cove River use naturally occurring sulphate in the sea water to break down organic material in the river, like leaves and twigs, giving off the foul smell of rotten eggs – hydrogen sulfide. This small amount of gas isn’t a problem. But add huge amounts of sulfurous compounds and organic waste from the nearby factory, and from sewerage overflows and you’ve got a giant, potentially toxic cocktail. But is it enough to kill two people? Hydrogen sulfide expert Professor Michael Moore and I are going to the site of Bogle and Chandler’s death to take a look.
Maryke Steffens: So this is the spot down here they think Bogle and Chandler originally were. They found bits and pieces of clothing down here, which indicated that they were probably lying down here. Now they think that hydrogen sulfide probably pooled in this area. Now why wouldn’t the hydrogen sulfide have just dissipated up into the air? Professor Michael Moore: Well, it wouldn’t because it’s more dense than air. Hydrogen sulfide gas would just sit right down there low down.
Maryke Steffens: Wouldn’t it have been pretty smelly?
Professor Michael Moore: Hydrogen sulfide has a very well-defined affect on the nervous system. It would paralyse the olfactory nerve, and so if you get a sudden big increase in concentrations, you would have paralysis of the nerve and you wouldn’t smell it anymore.
Maryke Steffens: So they never would have known?
Professor Michael Moore: They probably wouldn’t have known.
Professor Michael Moore: The lungs would be affected; the nerves controlling the muscles in your legs and arms, controlling the diaphragm, your capacity to breathe would also be affected. They might not have died immediately but they would pass out and be in situ and be there until eventually they would die.
Narration: Hydrogen sulfide enters the body, attacks the nervous system, and goes without a trace, making it almost undetectable… except for one subtle calling card: occasionally hydrogen sulfide binds to haemoglobin in the blood.
Professor Michael Moore: Because you change the chemistry of the haemoglobin you also have the capacity to change the way in which it absorbs light and therefore the colour that it shows.
Narration: In cases of poisoning, the blood can turn greenish-blue or purple, and when Peter interviewed the original toxicologist on the case, he recalled seeing this strange discolouration.
For Peter, this all but confirmed his theory and was a key piece of evidence in his documentary.
But not everyone is convinced.
Dr Jo DuFlou is the head forensic pathologist at Glebe Mortuary in Sydney. He’s only ever seen one case of hydrogen sulphide poisoning and he and Peter disagree on the odds of enough hydrogen sulphide being released to kill someone.
Dr Jo DuFlou: My impression is that in the 1960’s you were practically lining up and buying tickets to come here at night. You know so you’ve got a very common scenario on the one hand and a vanishingly uncommon event on the other hand.
Peter Butt: At the time no scientists came down here and measured hydrogen sulphide.
Peter Butt : But what we do have from previous years is the testimony of residents who live close to the river, within about you know thirty, forty metres. They were complaining of nausea, vomiting and breathlessness. Now that to me says we have a real, quite a high level of hydrogen sulphide.
Narration: Whether Peter’s evidence is conclusive is yet to be determined. But the question remains, could the river strike today?
Maryke Steffens: Mmmm, nice smell!
Narration: River scientist Stuart Simpson is testing the level of contamination in the river right where Bogle and Chandler died. Dr Stuart Simpson: So now we’re making a measurement of how reduced sediment is, and whether the conditions are conducive to H2S formation.
Maryke Steffens: What have we got?
Dr Stuart Simpson: What have we got? We’re heading towards that sort of zone.
Maryke Steffens: So hydrogen sulfide could be forming in this mud then?
Dr Stuart Simpson: That’s right.
Narration: Stuart will take the mud to his lab for further testing, but the samples taken today won’t tell us much about the river forty years ago, nor whether huge volumes of hydrogen sulfide seeped from the river on that fateful day.
Nevertheless, since Peter’s documentary went to air, several people there on the day
have come forward.
One man described being at the river that morning.
Lindsay Mitchell: I noticed the river was heavily polluted. It wasn’t flowing, it was stagnant and there were dead fish floating belly up. And as I got closer I noticed it stunk.
Narration: Later that same day a family stopped to watch the police activity along the lovers lane when their dog ran off down the river bank.
Derek Foster: I whistled the dog and he came up the river bank and when he got in the car we could not stand the smell it was like 50,000 rotten eggs.
Narration: In spite of this evidence, there’s still no smoking gun.
Dr Jo DuFlou: It leaves no trace in the body, especially if specimens have been looked at for a week or so, there’s nothing left over in the tissues.
Peter Butt : Yes it’s a shame but I guess when you look at the way forensics works I’m sure there has been a lot of cases where circumstantial evidence has actually delivered a conclusion.
Narration: At the CSIRO lab, Stuart’s analysis of the river sediment comes up positive: bacteria ARE producing hydrogen sulphide in the Lane Cove River… but not enough to be alarming.
Dr Stuart Simpson: I think overall it’s a very healthy system. You expect to see hydrogen sulfide building up naturally in these sediments due to these bacterial processes, and they’re not at unusually high levels.
Narration: Today there’s little, if any, evidence lingering in the river that could prove Peter’s theory. Due to the fleeting nature of hydrogen sulphide, we’ll never know for sure. In the end, it’s up to the coroner to decide.
Peter Butt: My report is now with coroner. Of the thousands of theories that are on police files, this is the first one with scientific and historical evidence to back it up. So I’ll wait like everybody else. I just hope that for family’s sake that we can put an end to it
NSW Department of Forensic MedicineThe National Research Centre for Environmental Toxicology The University of Queensland