MINNEAPOLIS (AP) — Officer Derek Chauvin had his knee on George Floyd's neck area — and was bearing down with most of his weight — the entire 9 1/2 minutes the Black man lay facedown with his hands cuffed behind his back, a use-of-force expert testified Wednesday at Chauvin's murder trial.

Jody Stiger, a Los Angeles Police Department sergeant serving as a prosecution witness, said that based on his review of video evidence, Chauvin applied pressure to Floyd's neck or neck area from the time officers began pinning Floyd to the ground until paramedics began to move him to a stretcher.

"That part...