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

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

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

A weekend stabbing spree at a Michigan Walmart initially left 11 injured, including six critically. As of the latest update, ...

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

Bystanders helped subdue the suspect in the mass stabbing event at a Walmart near Traverse City, according to law enforcement ...

Following the stabbing of 11 victims at a Walmart store near Traverse City, Michigan, on Saturday, Grand Traverse County ...

A group of bystanders, including a man armed with a firearm, rallied together to help stop a suspect who stabbed 11 people at ...

By the time an employee in the checkout area yelled about a man with a knife, it was too late. Nearly a dozen people had been ...

Eleven people were injured in a “random” stabbing by a suspect man with a folding knife-style weapon at a Walmart in Traverse ...

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 ...