Sarah Aarthun

When a gunman opened fire on revelers enjoying a night out in Dayton, Ohio, early Sunday, he killed 9 people in less than a minute. It was the second mass shooting in the US in less than 24 hours. Here’s what we know.

When a gunman opened fire on revelers enjoying a night out in Dayton, Ohio, early Sunday, he killed 9 people in less than a minute. It was the second mass shooting in the US in less than 24 hours. Here’s what we know.

A college country night at a bar in Thousand Oaks, California, turned deadly late Wednesday when a gunman forced his way in and opened fire on the young people gathered inside. At least 12 people were killed. Here’s what we know.

Five law enforcement officers were shot and one of them died after a barricaded suspect opened fire at an apartment complex in a Denver suburb, the Douglas County Sheriff said Sunday.

Five law enforcement officers were shot and one of them died after a barricaded suspect opened fire at an apartment complex in a Denver suburb, the Douglas County Sheriff said Sunday.

Parents of teenagers, Michelle Obama feels you.

Parents of teenagers, Michelle Obama feels you.

Hezbollah TV reported that Samir Kuntar, a Lebanese militant who served 30 years in an Israeli prison for murder, has been killed in Syria.

Hezbollah TV reported that Samir Kuntar, a Lebanese militant who served 30 years in an Israeli prison for murder, has been killed in Syria.

Two Marksville, Louisiana, marshals were indicted on murder charges Thursday in the death of a 6-year-old who was shot in his father’s car after a police chase.