Takeaways from AP investigation into police training on the risks of handcuffing someone facedown

For decades, police across the United States have been warned that the common tactic of handcuffing someone facedown could turn deadly if officers pin them on the ground with too much pressure or for too long.

Recommendations first made by major departments and police associations culminated in a 1995 federal safety bulletin that explained keeping someone on their chest in what’s known as prone restraint can dangerously restrict breathing. The solution: Once cuffed, turn them onto their side.

Yet today, what some officers are doing on the street conflicts with what has long been recognized as safe, a deadly disconnect that highlights ongoing failures in police training, an Associated Press investigation has found.