On Wednesday, lead investigator Det-Sgt.
Idsinga added "We do believe there are more".
He believes the audacious act of stashing remains in private yards would be immensely alluring to a killer by offering a sense of "immeasurable power" to secretly wield over city officials and victims' family members.
"These are people who have fantasized about this for some time, who put considerable mental and physical energy into scouting and identifying locations, preparing for any contingency", says Arntfield, who is also a professor at Western University in London, Ont.
It's believed McArthur targeted gay men in the Toronto area and at least one person has come forward to explain a violent encounter with McArthur previous year.
"We know that many in the community are struggling to understand and process these developments", Idsinga said.
Toronto-Mississauga is Canada's largest city with six million people.
They now say, however, they are investigating whether victims may have been targeted not only around the Gay Village, but in other communities and areas of the city.
Police had launched an investigation into the cases of three missing Middle-Eastern men (Skandaraj Navaratnam, 40; Abdulbasir Faizi, 42; and Majeed Kayhan, 58) from Gay Village in November of 2012. Kayhan went missing in 2012, and while Lisowick lived in homeless shelters in Toronto and was never reported missing, it is believed he was murdered between May 2016 and July 2017. "I'd call it an unprecedented type of investigation", Idsinga said. "It's a serial killer. There are at least two sites that we do want to excavate where people might be buried". Any clients of McArthur's landscaping services are being asked to contact Toronto police if they have not already been reached by the Project Prism task force.
The former landscaper made a court appearance Monday and will remain in custody until his next hearing on February 14.
At a press conference soon after McArthur's appearance, Karen Coles, Kinsman's sister, said her brother had wanted to be a paleantologist as a young boy.
Speedie said he hadn't seen McArthur in several years.
Investigators have erected a large tent with warming capabilities in the backyard to assist with further digging into the frozen ground.
McArthur, who is in custody, was originally charged with two counts of first-degree murder earlier this month.
"You have to understand, he has been kind, helpful, helped with our charity work, doing floral gifts for silent auctions", Fraser told CBC Radio. "He would frequently off-load flats of plants and pots of plants and flowers and take them out of his minivan and put them in the back of the house and bring the same things out from the back of the house and load them into his vehicle".
It was around that time, in 2001, that Mr. McArthur was arrested for beating a man living on Church Street with a metal pipe, convicted on two assault charges and ordered by the court to stay away from the Village and sex workers.
Serial offenders also tend to wind down as they grow older, Arntfield said. Lisowisk, police say, was never reported missing. They could come from anywhere in the [wider area], if they come into Toronto for an event such as Pride and then get reported missing.