When an accident may cause those who are not involved with the wounded or killed altogether. By caused by negligence in driving a different family that want to lose people in your family too.
When an accident happens, may not involve injury or death as well. The result of careless driving causing another family had lost someone in the family.
When the accident happened may be irrelevant with injured or killed, too. Caused by the careless driving the other families have lost family members, too.