Psychologist examines what can cause a mother to kill her children

While police continue to investigate the circumstances behind what led Lashanda Armstrong to drive into the Hudson River, killing herself and three of her children, psychologists are examining what may have caused the mother to take the lives of her children.

Dr. Arlene Adler, a psychologist in Westchester, says that it is likely a combination of elements that led her to commit the horrific act.

She says that metal illness, stress, postpartum depression and substance abuse could have all contributed to her deciding to commit suicide and infanticide.

Police have said that Armstrong had a domestic dispute prior to the incident, which Adler says can be a contributing factor to stress.

Adler adds that because of her 11-month-old child, she may have been suffering from postpartum depression. She says that the condition can last more than a year after the birth of a child.

"Thirty-eight percent of suicidal women will take the life of children because they don't want to leave them behind in a cruel world for no one to take care of them," said Dr. Adler.

Police: Woman fought with boyfriend before driving into HudsonFire chief: Mom drives minivan into Hudson, kills 3 kids, self

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