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.

In the fall of 2018, Tommy Mobley was in his college dining hall when he noticed a classmate, seemingly struggling, sitting alone, staring down at the floor. His slouched shoulders and exhausted ...

Bystander videos have shaped public perception for decades. The ability to now spread video widely can lead to real-time access and transparency,... Millions of people have seen videos on social media ...