Cops: Two 15-Year-Old Girls Found Dead at High School in Apparent Murder-Suicide Shooting

Brother Mourns Vet, 24, Shot Dead At ATM: 'I Never Knew Anything Could Be This Painful'

Return of the Knockout Game? Police Investigate Shocking Violence Caught on Video

FBI: Virginia Tech Student Charged in Abduction and Killing of 13-Year-Old Girl 'Excited' About Plot

Classes on How to Survive a Shooting Are a Huge Draw

Officials: No Signs of a Shooting At San Diego Naval Facility After Report of Gunfire

Anti-Abortion Activists Indicted for Planned Parenthood Video, Group Cleared of Wrong-Doing

Communities Mourn Two Police K-9s Shot and Killed Just Hours Apart

Attacker Who Shot Philadelphia Cop With Stolen Police Gun Said He Did it For ISIS

Enrique Marquez Jr. Pleads Not Guilty to Terror Charges in San Bernardino Massacre