Investigators suspect he was sexually involved with his victims, who he killed between 2010 and 2017. Police arrested McArthur in January 2018.
A covert but legal police search of McArthur's home in December revealed photos of the victims on McArthur's digital devices.
Many wept in court Monday as prosecutors provided previously unheard details of the killings, which took place between 2010 and 2017.
Police recovered a USB key in his home with folders labeled Skanda, Bazir, Hamid, Number 4, Number 5, Slider, Turkish Guy, Andy, and John.
Prosecutor Michael Cantlon said McArthur would later access some of the photos long after the killings.
Sergeant Paul Gauthier of the Toronto Police Service is charged in connection with a 2016 incident in which police failed to follow up on a complaint that Mr. McArthur tried to strangle a man during a sexual encounter.
Pictures of Soroush Mahmudi lying in bed with his eyes taped open and a cigar in his mouth and a white rope around his neck were found. McArthur had put a fur coat on his body, which police later found in McArthur's van. McArthur was arrested just weeks later.
Most of McArthur's victims shared similar physical appearances, sporting facial hair or a beard and six were immigrants of South Asian or Middle Eastern descent.
He faces a potential sentence of life in prison with no chance for parole for 25 years or more.
The detail of the killer's last criminal act was one of many disclosures at his sentencing hearing, which is expected to conclude at Ontario superior court on Friday.
While all eight of the men he admitted murdering had ties to Toronto's gay community, a lot of them were further isolated due to a combination of racial, cultural or economic factors. He also held onto items belonging to them.
Mickelson one back at Pebble Beach
American Jordan Spieth has not won a tournament since 2017 but the three-time major champion is feeling good. A 54-hole cut is made and the final round is played at Pebble Beach.
Seven members of Toronto's LGBTQ community had gone missing without a trace over a seven-year period.
Det. -Sgt. Hank Idsinga, who led the investigation into McArthur, said that in the course of his work on the case he came across "concerning" information that triggered the internal probe. Notley recalled Prentice as a man committed to alleviating child poverty and honouring the promise of reconciliation with Indigenous peoples.
The lawyer for a Toronto cop facing disciplinary charges in conjunction with the Bruce McArthur probe said he wants an independent adjudicator for his client. "He was unable to swallow properly again for a week", Cantlon said.
Those charges, which are unrelated to the McArthur case, were ultimately dropped and the matter was dealt with internally.
In the course of his argument, Harper said the Crown thinks a "measured" penalty of making McArthur wait 50 years before he could ever apply for parole would be sufficient to achieve justice for McArthur's victims. He was eventually named as one of the eight murder victims.
Following the reading of the detailed statement of facts, family members and friends of McArthur's victims began to speak, including Patricia Kinsman, who began her statement saying "never in my wildest dreams did I envision (my brother's) life ending in this way".
"Torture and murders like these are incidents that occur all too frequently in Sri Lanka", said Piranavan Thangavel.
Ted Healey, a friend of Kinsman, said he took some satisfaction that McArthur owned up to his crimes.
"(McArthur) was caught", Harper said. "He stole from us someone who was valued, loved and admired".
Among her emotions is the vengefulness she feels toward McArthur, who sat motionless for the second straight day as the impact statements were read aloud in sequence.