Their bodies were later found along the Alaska Highway, 12 miles south of Liard Hot Springs, which is a popular tourist attraction in British Columbia.
"We were there to help them ... but yet that same day the complete opposite of humanity hurt them like that and killed them so tragically", Sandra said.
Canadian police said on Monday (Tuesday NZT) they are searching for two men whose burning auto was discovered on Friday about 50km south of Dease Lake.
The RMCP said Mr McLeod and Mr Schmegelsky were driving the Dodge pickup but have not been in contact with their family for the last few days.
It's unclear whether the couple was targeted, or were victims of a crime of opportunity, RCMP Sgt. Janelle Shoihet told Canadian reporters on Friday. "I want to ensure that people are aware that we're doing everything that we can in order to ensure that we can advance this investigation to the best of our abilities and find the person or persons responsible", she later added.
Lucas Fowler and girlfriend Chynna Deese.
Police said they do not believe this man is a suspect. That man is still unidentified.
Two kilometres from the body, a burned-out vehicle was found and two teenagers who had been travelling to Yukon in the truck remain missing.
Eyewitnesses told media they saw the couple on the facet of the boulevard when their van broke down, but that they perceived to bear it below set an eye fixed on. They have not released information about the manner or time of his death.
"We are looking into the possibility that they may be linked", Shoihet said.
RCMP said it's not clear why the pair returned to B.C. or what their travel plans may have been, but they may have been in an area without cellphone coverage when they disappeared. Notifying others of a planned route and periodically checking in are important safety steps, she said.
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Fowler's father, Stephen Fowler, is a police chief inspector in Australia and said the family has been "crushed" by the news of the deaths.
The couple had met at a hostel in Croatia in 2017 and had travelled together across the United States and overseas to Mexico, Peru and elsewhere. But the RCMP have not yet released a cause of death for the pair.
Stephen Fowler confirmed he was accompanied by two NSW police detectives, who were helping his family liaise with the RCMP.
"It's a love story that ended tragically", he said.
Curtis and Sandra Broughton say they met Deese and Fowler shortly before their deaths.
"What happened after that, time will tell I guess", he said.
The RCMP asked the public to come forward with any information.
The senior Australian police officer whose son was shot dead in a remote part of Canada last week alongside his American girlfriend has described their relationship as the world's "worst ever love story".
But so far there is no indication that the crimes are at all linked to the Highway of Tears investigations, Shoihet said.
Christoph and Erika Weder had hired Fowler in February to work on the Hudson's Hope ranch.