McArthur, 66, was charged with first-degree murder on Wednesday in the death of 42-year-old Abdulbasir Faizi, Toronto police spokesman Hank Idsinga said in a news conference.
McArthur was arrested on January 18, one day after police uncover evidence that "pushed the case over the edge", allowing them to charge McArthur in the deaths of Kinsman and Esen while initiating a massive search of properties connected to McArthur.
His remains were identified as one of at least seven dismembered bodies found in plant pots on a midtown property. Police are expected to give a further update on the case around 1:30 p.m. local time.
In January, McArthur was arrested and charged with the murders of Esen and Kinsman. They said they had identified three sets of remains belonging to Andrew Kinsman, Soroush Mahmudi, and Navaratnam. While he said there is no current evidence linking McArthur to the cold cases, he said they fit the general profile of the alleged victims identified to date.
Bruce McArthur, that looked in court by means of a movie link, has been charged with premature murder from the passing of Abdulbasir Faizi.
Police are also waiting for warmer weather to investigate other properties associated with McArthur, Idsinga said.
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They are also reviewing 15 unsolved murder investigations dating from 1975 to 1997.
Idsinga said the remains of all but Kayhan have been identified among those recovered from the planters at the central Toronto home.
Toronto police are also seeking the public's assistance in identifying another potential victim, whose graphic photo was released on March 5.
In May, investigators will begin searching 75 Toronto properties linked to the self-employed landscaper.
Forensic teams are still collecting evidence from McArthur's apartment in the city's Thorncliffe Park neighbourhood. During Wednesday's briefing, Idsinga said they have received more than 500 tips with more than 70 possible identities for the man in the photo. Including Faizi, all seven men vanished between 2010 and 2017.
McArthur's next court appearance is scheduled for April 25.
McCarthur was charged with a sixth count of first-degree murder on February 23 for the death of Skandaraj Navaratnam, 40, who hadn't been seen since September 2010.