KATHLEEN MCCLEERY:

He put down his backpack and took two small knives from his pockets. Officers fired six live rounds, hitting him three times. He died the next day at a hospital.

Protests erupted after the Boyd shooting. Hundreds confronted police in riot gear, who used tear gas and made multiple arrests. The Boyd killing was one of five involving Albuquerque police in a two-month stretch in 2014.

By all accounts, the video taken by officer Perez is critical. It's the first time such evidence will be used in a murder case against police in New Mexico and one of about a half-a-dozen cases nationally. But there's little agreement on what the video shows.

Attorney Sam Bregman represents Keith Sandy.