As families, students, and the Evergreen community grapple with emotions and questions in the days since the shooting at Evergreen High School , Delmer Martinez is grappling with what he witnessed and caught on camera as the tragedy unfolded before him.

Delmer Martinez

"In that moment, I didn't know how to react," said Delmer Martinez. "I got out of the car and started to film."

Martinez tells CBS Colorado, he and another coworker were working a roofing job in Evergreen Wednesday and had just finished up their lunch break, when they started to drive down Buffalo Park Road near Olive Road. That is when a police officer sped past them and got out of their car.

"It was there where we saw a young person fighting," he tells CBS Colorado in Spanish. "He came out holding another student b

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