On June 13, 1901, Ada Maria Redpath, and her son Jocelyn Clifford were found shot to death in their home. What exactly happened between the two of them is something we will likely never understand.
Research:

Adams, Annmarie, et al. “‘She must not stir out of a darkened room’ 1:  The Redpath Mansion Mystery.” Material Culture Review 72. Fall 2010. https://www.academia.edu/26130347/Articles_She_must_not_stir_out_of_a_darkened_room_1_The_Redpath_Mansion_Mystery
Enos, Elysha. “History buffs still fascinated with the Redpath Mansion murders, 115 years later.” CBC News. June 13, 2016. https://www.cbc.ca/news/canada/montreal/this-day-in-montreal-redpath-murders-1.3632064
“Son Clifford Did It.” The Ottawa Citizen. June 15, 1901. https://www.newspapers.com/image/456123782/?terms=Redpath&match=1
“The Victoria Rifles of Canada.” Government of Canada. https://www.canada.ca/en/department-national-defence/services/military-history/history-heritage/official-military-history-lineages/lineages/infantry-regiments/victoria-rifles.html
Adams, Annmarie, et al. “The Redpath Mansion Mystery.” Great Unsolved Mysteries in Canadian History. https://www.canadianmysteries.ca/sites/redpath/home/indexen.html
“The Redpath Tragedy.” The Weekly News-Advertiser.” June 18, 1901. https://www.newspapers.com/image/775410318/?terms=Redpath&match=1
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