The 27-year-old Nevada man left a note at the scene voicing anger that his mental illness may be linked to his having played football, officials familiar with the investigation told NBC News.

A police officer shot a man outside a home in Berlin Township on Tuesday afternoon, according to a neighbor who said he saw the incident.

Former FBI Special Agent Vito Roselli said one of the biggest challenges with safeguarding city buildings is that many ...

While details continue to emerge about a motive for the shooting, CBS News Philadelphia is looking into building security in ...

Philadelphia police have identified two more people wanted in connection with a deadly quadruple shooting in Nicetown, where ...

The gunman in a recent Manhattan shooting claimed he had CTE. Here's what CTE is, plus what the most recent research suggests.

The shooting at the birthday party in Nicetown left Quron Ross-Weems, 26, and Nyfik Johnson, 29, dead, police said.

Philadelphia police are continuing to investigate a quadruple shooting and double homicide that happened at a gathering in Nicetown Saturday night.

Lawrence Coleman, 25, and Virgil Williams, 29, are being sought for the July 26 shooting that killed 29-year-old Nyfik ...

Law enforcement officials in Philadelphia have named two suspects sought after two men were killed and a mother and her ...

Investigators have arrested 37-year-old Shaheed Kilber and charged him with the murder of 29-year-old Nkechi Sprowal. Sprowal ...