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

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 ...

Multiple people were involved in stopping and detaining the suspect in Saturday's attack at a Walmart store in Traverse City.

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

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

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, ...

"I'm still sitting and grappling with the weight of realizing that it was kind of a life-or-death moment," said Julia Martell ...