A staff member who witnessed the mass shooting that left 10 dead in a Colorado grocery store spoke out about the moment the siege ended.

Maggie Montoya, 25, who works as a pharmaceutical technician at the King Soopers in addition to being a professional runner, said she was first warned about the active shooter when her manager yelled, “Active shooter,” and everyone “scattered.”

Recommended Stories

Here’s what we know about the victims of the Colorado shooting

Biden demands Congress ban assault weapons after Boulder mass shooting

Biden could turn 3 million to 4 million gun owners into felons