In 2011, a 17-year-old named Mishka told readers of his Facebook post that his Salem, Ore., high school was "asking for a f***ing shooting." That post and other furious outbursts triggered a quick, but deep evaluation by the school district's threat assessment unit.
Beth Nakamura for NPR
Micheail Ward continued to deny his role as the gunman in the fatal shooting of Hadiya Pendleton at a sentencing hearing on Jan. 14. Ward was convicted of first-degree murder and aggravated battery in August.
Jose M. Osorio/AP
Relatives and friends of Eduardo Felipe Santos Victor, a teenager who was shot dead in Morro da Providencia, a low-income favela community, mourn during his funeral in Rio de Janeiro, on Sept. 30, 2015.
Jason Dalton talks with his defense attorney Eusebio Solis moments before pleading guilty to six counts of murder and other charges on Monday, in Kalamazoo, Mich. Opening statements in the trial were scheduled to begin Tuesday.
As of Dec. 27, this year 144 federal, state and local law enforcement officers have died in the line of duty — a rise from the 129 officers killed in 2017. Here, wounded Dekalb County Police K9 Indi stands by his handler's side during a funeral service for Edgar Flores on Dec. 18 in Georgia.
A new study from the New England Journal of Medicine finds that motor vehicle crashes were one of the leading causes of death among children and adolescents in the U.S. in 2016.
Tim Graham/Getty Images
Joel Fitzgerald is currently the chief of police for the Fort Worth Police Department, a position he's held since 2015. He is the mayor's leading candidate to become the top cop in Baltimore.
Fort Worth Star-Telegram/TNS via Getty Images
Sakran, a Johns Hopkins trauma surgeon, created the Twitter account @ThisIsOurLane and encouraged other doctors to share their experiences treating victims of gun violence.
Courtesy of Joseph Sakran
At MOM-O's Thanksgiving Memorial Brunch, family members can light a candle in honor of their lost loved one. In its 25 years, the organization has supported hundreds of families in Charlotte through the loss of a relative after a homicide.