Matthew Kolakowski, a U.S. Marine and son of a Kent County sheriff's detective, helped subdue a man accused of stabbing 11 people at the Traverse City Walmart.

"I'm still sitting and grappling with the weight of realizing that it was kind of a life-or-death moment," said Julia Martell, who witnessed the stabbing, which wounded 11 people.

GRAND TRAVERSE COUNTY — Northern Michigan healthcare providers say that Saturday’s Walmart attack emphasizes the need for significant investment in area mental health services. The suspect in the attack had a history of mental illness and violent episodes, leading some to examine what resources are available for those struggling.

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

The suspect who allegedly injured 11 people with a knife at a Michigan Walmart on Saturday is a mentally unwell

Bradford Gille was arraigned on multiple charges, including assault with intent to murder and terrorism. Magistrate called allegations "heinous."

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