By CBS3 Staff

LANCASTER, Pa. (CBS) — Officials in Lancaster have justified a police officer’s use of deadly force last month. An investigation began following the fatal shooting of 27-year-old Ricardo Munoz on Sept. 13.

Officers responded to a domestic disturbance on the 300 block of Laurel Street just after 4 p.m.

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Authorities say Munoz chased the officer with a knife when he turned and opened fire. The man died at the scene, authorities said.

The district attorney’s office say “there was no time or opportunity for de-escalation.”

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The Lancaster County District Attorney’s Office released bodycam footage of the incident last month.

“The footage shows that when the officer gets in front of a residence in the 300 block of Laurel Street, Munoz immediately emerges from inside and runs toward the officer, brandishing a knife above his head, in clear view, in a threatening manner. The officer then fired,” the DA’s office said.

Officials said no one else was struck by gunfire.

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Hundreds of protesters took to the streets of Lancaster following Munoz’s death. As a result, eight people were arrested.