Police say a 17-year-old has been arrested on a murder warrant after fatally shooting a schoolmate on the campus of an Arlington, Texas, high school

A Michigan dad was charged with violating the state's safe gun storage law after his son allegedly got a hold of his firearm and shot himself, investigators said.

"Those children were hunted down," police said.

This week marks 25 years since two seniors at the Colorado high school killed 12 students and a teacher.

ABC News' Ike Ejiochi has the latest on the investigation into the shooting of an 18-year-old woman on the campus of Delaware State University.

The officer, a six-year veteran of the CPD, was shot multiple times, police say.

The woman, who was not a student, was found with near a freshman dorm.

Idaho sheriff’s deputy died after being shot by a driver during a traffic stop.

A high school senior was shot outside a party following a high school prom.

Police said hundreds of people attended the block party.

Andrea Ye, of Rockville, Maryland, whose preferred name is Alex Ye, was arrested after law enforcement was alerted to a 129-page "memoir" he allegedly wrote

Twenty-five years after Columbine, school shootings continue to increase.

Two people were killed and 6 others were injured after gunfire erupted at a block party in Memphis, Tennessee.

Five Maryland teens between the ages of 16 and 18 were shot during a senior skip day gathering in the park. ABC News' Phil Lipof reports.

Five teenagers were shot after gunfire rang out at a large gathering of high school students taking part in a senior skip day in Maryland, police said.

The suspect is an 18-year-old high school student in Maryland who police say, wrote a 129-page "manifesto" with attack plans.

Fred Guttenberg, who lost his daughter Jamie in the 2018 school mass shooting, speaks with ABC News' Rachel Scott about his push for more gun control.

The tragic events at Columbine High School in 1999, when 12 students and one teacher died in a mass shooting, marked a turning point for America.

A documentary premiering on April 18 will cover the first involuntary manslaughter convictions for parents of a school shooter.

At least five people have been injured in a shootout involving teenagers gathered for senior ditch day in Greenbelt, Maryland, said police Chief Richard Bowers.

ABC News’ Morgan Norwood met with three people directly impacted by the Columbine High School shooting to reflect on 25 years of grief, healing and the path to turning pain into meaningful purpose.

A teenager was arrested after investigators said they found writings where he described a plan to shoot up his former schools.

At least 415 people have been killed in school shootings since the massacre at Columbine High School in 1999, according to the gun violence archive.

Columbine shooting survivors are joined by a survivor of the Washington Navy Yard shooting and the Aurora Theater shooting to sit down with ABC’s Morgan Norwood to share their long journey of healing.

The police chief in Albany, New York, says an officer was “ambushed” by a driver who shot him the leg as he approached a vehicle following an attempted traffic stop and returned fire, killing the man

A 16-year-old boy was shot multiple times when answering the door in Philadelphia, police said, while two younger children who were sleeping inside avoided any injuries.

A shooting outside a New Orleans nightclub over the weekend has prompted renewed calls from city officials for changes to a pending Louisiana law allowing people to carry concealed handguns without a permit

Eleven people were shot including an 8-year-old girl who was killed in what Chicago police believe was gang-related violence on the city’s South Side

Seven people lost their lives after multiple shootings during a violent weekend in Chicago including one child killed after gunfire erupted at a family gathering.

A child was killed and at least 10 other people were injured, including a 1-year-old and an 9-year-old, when gunfire broke out in Chicago, according to police.

An officer and an 18-year-old suspect were killed during a shootout in Memphis after police responded to a call of a suspicious vehicle. Two other officers and a passenger were wounded.

Ebony Parker, the ex-assistant principal of Richneck Elementary School, where a 6-year-old shot teacher Abby Zwerner in January 2023, has been indicted for child abuse.

One person was killed and five have non-life-threatening injuries, police said.

Former police officer Marcus Johnson shot and killed a man Tuesday morning, authorities said. Johnson is to be considered armed and dangerous.

One person was killed and five others injured, including two children, after gunmen opened fire in a residential area in Washington, D.C., on Wednesday, police said.

Multiple people were injured after gunfire broke out at a celebration to mark the end of Ramadan in Philadelphia on Wednesday, police said.

The shooting happened amid a celebration marking the end of Ramadan.

Police said there appeared to be two factions in the park that began exchanging gunfire during an event celebrating the end of Ramadan.

Four suspects are in custody after a shooting in Philadelphia neighborhood, the circumstances of which are not yet known.

The suspect is also dead, according to police.

A security guard was shot dead and a responding officer and six others suffered gunshot wounds, after an altercation among patrols at a broke out in Florida.

Police in Nashville, Tennessee, are searching for a man suspected of a shooting during Easter brunch.

Nashville police said they are searching for the suspect, Anton Rucker, 46, who allegedly got into a dispute with the victim at Roasted on Sunday afternoon.

Authorities are looking for suspects behind a Saturday night shooting at an Indianapolis mall that left seven minors with gunshot wounds, with one still remaining in critical condition.

Seven juveniles, including a 12-year-old, were injured when gunfire erupted outside a mall in downtown Indianapolis late Saturday night.

Police are investigating a mass shooting Saturday night resulting in seven children injured.

The party had about 50 people in attendance.

Police say they are searching for three suspects connected with the shooting. 

At least three assailants were being sought Monday in the killings of two teenagers police said were "targeted" weekend shooting in Nashville.

Police said an off-duty officer is among the five people wounded.