Millions of people have seen videos on social media, from multiple angles, of the death of 37-year-old Alex Pretti. On Saturday, federal immigration agents shot and killed Pretti in Minneapolis.
Bystander videos, like the ones taken of Pretti, have played a key role for decades in informing the public when law enforcement kills or injures people.
Videos shared online are now central to shaping public perception and understanding of events, experts said…