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

Derrick Perry says he's no hero for helping subdue Bradford James Gille, who faces terrorism and assault charges for ...

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

Derrick Perry, a United States Marine veteran, confronted a knife-wielding man in the parking lot of the Traverse City ...

Derrick Perry speaks with ABC News on Good Morning America./ABC News(TRAVESE CITY, Mich.) -- A former Marine who helped ...

The community is showing their support after Saturday’s tragic stabbing incident at Walmart in Traverse City. There are ...

Matthew Kolakowski, U.S. Marine veteran and one of the bystanders who took action during the Traverse City Walmart stabbing o ...