Martin Godin, 54, of St. Isidore, Quebec, died at a hospital Sunday night. He had lingered since the early February slayings, the Canadian Broadcasting Corp. reported Monday.
Godin was found critically wounded in his home Feb. 2 alongside his daughters Beatrice, 11, who died three days later, and Medora, 13, who was dead at the scene. The bodies of Nancy Samson, 44, and Benoit Daigle, 39. were found outside a house more than 40 miles away in St. Croix de Lotbiniere, QMI Agency reported.
The news agency reported its sources said investigators suspect Godin had been unable to accept his breakup with Samson.
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