GRAND RAPIDS, MI - Matthew Kolakowski had just left the Walmart checkout lane when a worker screamed that a man had a knife.

Marine veterans Matthew Kolakowski and Derrick Perry helped stop a man accused of attacking 11 people near Traverse City, ...

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

A man was arrested and is facing multiple charges for allegedly stabbing 11 people at a Walmart in Traverse City on Saturday.

Walmart in Traverse City Saturday, July 26th. One of the bystanders, Matthew Kolakowski, is from Kent County. He helped to ...

Por MICHAEL CASEYMatthew Kolakowski estaba comprando equipo de pesca y botanas con su hija en un Walmart de Michigan durante ...

Matthew Kolakowski was shopping for fishing gear and snacks with his daughter at the Traverse City Walmart over the weekend ...

One of the men who authorities say helped take down a suspect who stabbed eleven people at a Walmart told NBC News about how ...

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

Two brothers who took action during the Saturday Traverse City Walmart stabbing that injured 11 people sat down for interviews in Grand Rapids Tuesday.

A Kent County man who helped stop the attacker who authorities say stabbed 11 people at Traverse City-area Walmart said ...

The actions some shoppers drew praise from authorities. Overnight, the strangers became online celebrities for their heroics ...