According to ABC News, which originated from local police, Nguyen’s husband went home to work and found his wife unconscious while two daughters di‌ed. The 47-year-old woman was quickly taken to the hospital but the authorities did not reveal her condition.

Sheriff Bill Russell of Ontario said the task force found two suicide letters, one in the house and one in the car, with the content of Nguyen planning to kill two children, then commit suicide.

According to Mr. Russell, the 14-year-old victim was "in need of special as‌sistance" and the scene showed signs of struggle. There is no clear motive for the case, but police say the mother has depression.

Authorities confirmed that after being discharged from the hospital, Nguyen will be taken to detention for investigation .