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

Police across the United States have been warned for decades that the common tactic of handcuffing someone facedown could turn deadly. An Associated Press investigation has found that what some officers are doing on the street conflicts with what has been recognized as safe. That's a deadly disconnect that highlights ongoing failures in police training. Each state writes its own standards, and individual departments and training centers determine what officers hear in classrooms and gyms. The safest techniques don’t always filter down to officers.