Toronto police have charged 66-year-old landscaper Bruce McArthur with five counts of first-degree murder, calling him an alleged serial killer. Here is a glance at the alleged victims.

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MAJEED KAYHAN

Majeed Kayhan

The 58-year-old Toronto man was reported missing in October 2012.

Police investigated his death as part of Project Houston, which ran from November 2012 to April 2014 and probed the disappearances of three men who went missing from Toronto's gay village.

The probe was closed after yielding neither suspects nor leads on what happened to the men.

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SOROUSH MAHMUDI

Soroush Mahmudi,

The 50-year-old was reported missing in 2015 by his family in east Toronto.

Police wouldn't discuss whether Mahmudi had any sort of relationship with McArthur.

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DEAN LISOWICK

Dean Lisowick,

Police have said Lisowick, a 43-year-old of no fixed address, was never reported missing, but investigators believe he was killed sometime between May 2016 and July 2017.

Det.-Sgt. Hank Idsinga said Lisowick didn't "quite fit the profile of the earlier victims," who were gay and of Middle Eastern descent. Police wouldn't discuss the specifics of what sort of relationship he had with McArthur, if any.

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SELIM ESEN

Selim Esen

Esen, 44, of Toronto vanished from the city's gay village on April 14, 2017.

The disappearance became part of a police probe called Project Prism launched in August. Five months later, police charged McArthur with Esen's presumed death.

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ANDREW KINSMAN

Andrew Kinsman

Kinsman was reported missing from the gay village in late June 2017. The 49-year-old Toronto man was a subject of Project Prism, and police said that he had a sexual relationship with McArthur.

Kinsman's sisters said they searched for their brother for six months before police eventually charged McArthur in his death. Karen Coles said he was "well-known in his community" -- a hard worker who was "loved by all."