Nearly a dozen people were injured in the attack before citizens -- including Derrick Perry, who was armed with a gun -- ...

The suspect at times went off on tangents about cigarettes filled with fiberglass and seeing videos about psychotropic drugs.

In an ABC News exclusive, Derrick Perry recounts his confrontation and pulling his gun on the man accused of stabbing 11 ...

The suspect at times went off on tangents about cigarettes filled with fiberglass and seeing videos about psychotropic drugs.

Matthew Kolakowski was shopping with his daughter at a Michigan Walmart when he heard screams and saw a man with a knife ...

Court records show the man charge with stabbing 11 people at the Traverse City Walmart was treated for a year at a mental ...

Darius Barney, 25, was arrested less than two hours after the deadly attack on Saturday night, Chicago police said.

A Walmart employee was helping a customer check out when she heard a warning that someone in the store had a knife.

Erie police charge a city woman with first-degree murder in the fatal stabbing of a 49-year-old man on Peach Street.

Video footage from the incident shows bystanders confront the suspect after a stabbing rampage that initially left 11 people ...

Video shows an armed bystander confronting a knife attacker who allegedly injured 11 people at a Walmart in Traverse City, ...

A man was fatally stabbed Saturday in San Francisco, and a suspect was arrested, police said. The attack was reported around ...