Heavy police presence at high schools in Fullerton
Security was tightened at two Fullerton high schools after there were reports of a person walking around the area with a rifle.
25 years after Columbine, survivors still struggle with trauma
Twenty-five years after the Columbine High School shooting, survivors continue to grapple with the enduring trauma from the attack.
Marina del Rey gunman accused of livestreaming shooting from apartment rooftop
A suspected gunman is in custody – but not before drawing an active-shooter response for allegedly spraying bullets from the rooftop of a Marina del Rey apartment building.
Death toll rises to 115 in Moscow terror attack, 11 suspects arrested
The Islamic State of Iraq and Syria (ISIS) has claimed responsibility for one of the most deadly terrorist attacks in Russia in years
Maine mass shooter's guns should have been seized weeks before, report finds
Maine mass shooter Robert Card should have been in protective custody and had his weapons seized weeks before he killed 18 people, a new report concludes.
James Crumbley Trial: Father of Oxford High School shooter found guilty
A verdict has been reached in the James Crumbley trial, the father of the Oxford High School shooter.
James Crumbley Guilty: Convicted of involuntary manslaughter after monumental jury trial
It was the second guilty verdict secured by the prosecutor after she took the unprecedented step of charging both James and his wife Jennifer in connection to the mass shooting carried out by their son.
Maine mass shooting suspect Robert Card had traumatic brain injuries, new scan shows
The Army reservist who killed 18 people in what became Maine's deadliest mass shooting in the state's history, sparking a massive manhunt before he was found dead last year, had traumatic brain injuries, a news scan shows.
Here's what apparently led to the Kansas City parade shooting
One of the men charged with murder in connection to the deadly shooting told police he was "just being stupid."
Kansas City parade shooting: 2 juveniles charged, police say
Two juveniles are being held for the Kansas City victory parade shooting that killed Lisa Lopez-Galvan and injured 22 others, police said Friday.
Taylor Swift gives $100K to Lisa Lopez-Galvan's GoFundMe after KC shooting
Kansas City shooting victim Lisa Lopez-Galvan was a beloved local DJ. Taylor Swift sent her "deepest sympathies" to Lopez-Galvan's family, along with a $100,000 donation.
Kansas City parade shooting: Half of victims are younger than 16, police say
A day after a shooting at the Kansas City Chiefs’ Super Bowl parade killed one person and injured 21 more, here's what we know about the suspects, victims and motive.
Ontario student plotted school shooting, had 6 intended victims, police say
An arsenal of weapons and ammunition were recovered at the student's house.