Dr. Epp was interviewed by the Toronto Star about research on U.S. traffic stops and race in the article, "For black Americans, police traffic stops far from ‘routine’." Here's an excerpt:
"When Epp and his colleagues studied traffic stops in the Kansas City region, they found no difference in the frequency with which black and white drivers were stopped for serious violations like speeding. And they found no difference in how blacks and whites were treated during those stops.
"The racial bias was in the other stops — the minor kind that led to Castile’s death. They’re the ones where officers pull people over citing a minor issue, then start asking unrelated questions."