A 12-year-old boy on Oahu was arrested after threatening to shoot another child while carrying a gun, a troubling sign for school safety in Hawaii.

• The boy showed a gun and threatened to shoot a 13-year-old girl's brother near a business on Fort Weaver Road in the morning.
• The girl reported the threat to her school.
• School staff found the gun in the boy's backpack and called police.
• He was arrested for first-degree terroristic threatening.

Outlook: Expect questions about how a 12-year-old got a gun and closer attention to school safety on Oahu.