Two recent shootings by federal immigration agents have cast a fresh spotlight on incidents in which authorities open fire on moving vehicles, a tactic that has fallen out of favor with the LAPD and many other law enforcement agencies across the country because it often turns deadly and puts bystanders at risk.

As he approached Renee Good’s vehicle on a Minneapolis street on Wednesday, Immigration and Customs Enforcement agent Jonathan Ross held up his phone camera and recorded video.

“There’s a group of people in this community who care very deeply about one another and about what they see happening in this country and who are determined to raise the alarm and come together and st...