Messner and tardiff's study using the routine activities approach found that

They found that since the very young and the elderly spend more time at home, these groups would likely be victims in family homicide situations.

This happens because the perpetrators tend to see the very young and elderlies as the people who do not possess the power to fight back, which make them believe they could get away with the criminal act. What more terrifying is that the perpetrators in these circumstances tend to be the acquaintances of the family.

Habit is no concious