In hundreds of deaths where police used force meant to stop someone without killing them, officers violated well-known guidelines for safely restraining and subduing people multiple times, an Associated Press investigation found.

The federal government has struggled for years to track deaths that happened after police used force like physical restraints and Tasers that isn’t supposed to be lethal. After George Floyd was killed under a police officer’s knee, a team of reporters led by The Associated Press set out to do their own count.