Derrick Perry, the armed citizen who played a crucial role in the apprehension of a stabbing suspect at the Traverse City Walm ...

"The only thing that separated me from the other gentleman that had stepped in as well was what I was carrying in my hands," ...

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

The hospital treating the 11 victims injured in a random attack at a Traverse City Walmart has provided an update on their ...

GRAND TRAVERSE COUNTY, MI -- The victims in Saturday’s stabbing attack at a Walmart in the Traverse City area are all ...

The Grand Traverse County Sheriff's Office received a statement from a citizen who helped detain the suspect in Saturday's ...

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

"I didn't think of anything other than trying to get him away from people and get him isolated, and get him to put the knife down," Derrik Perry said to ABC News.

Bradford James Gille, 42, faces terrorism charges after the mass stabbing incident at a Traverse City-area Walmart.

A former Marine who was armed with a gun confronted the suspect accused of stabbing several people at a Michigan Walmart.

O'Brien and Kolakowski, who are brothers-in-law, were visiting the Walmart to pick up supplies for a family vacation when the ...