The more prevalent mass shooting is not a carefully planned attack but rather a more spontaneous outbreak of violence that kills.
The death of New York City police detective Brian Simonsen, who was fatally wounded Feb. 12 in a friendly-fire incident, is tragic. The officers whose shots struck their fellow officers — not only killing Simonsen, ...
Prosecutors indicated that the contents of the Washington, D.C., house they searched bolstered their fear that Jeffrey and Edward Clark might well have been bent on violence.
The authorities said they arrested a Washington, D.C., man who had hailed the suspect and might have known more about the attack.