U.S. police reportedly killed more than 1,100 Americans in 2015, many of whom were unarmed. In response to the public outcry, a group of U.S. police chiefs traveled to Scotland to learn how to teach their forces to be less violent (video below).
Sky News filmed Chuck Wexler, an ex-hostage negotiator for the Boston police department, as he brought chiefs from major cities in the U.S., including New York and Los Angeles.
Wexler told U.S. and Scottish law enforcement how American cops would respond to a suspect armed with a rock: "You're going to kill someone for throwing a rock. That's what you're gonna do."
"How would society over here think about you shooting someone with a rock?" Wexler added. "They would not accept it."
During the four days of training, U.S. police chiefs went on patrol with unarmed police in Glasgow, Scotland, where they encountered possible volatile situations.
The Scottish police demonstrated how they do not escalate situations, arm themselves with shields for protection and negotiate with suspects.
"The American style of policing, it's very authoritative," Sgt. Jim Young observed. "There's a difference of going in, straight up at this level, whereby you're ordering people, you're shouting at them. You can't go anywhere after that."
"But if you start down low you can adjust your communications to suit," Young added.
Many U.S. police officers use an informal "21-foot rule" which means they shoot a suspect armed with a sharp weapon if they get any closer than 21 feet away. Police in Scotland have only shot suspects twice in the past 10 years.
The Guardian reported in 2015 that American police kill more people in days than many developed countries do in years.
For example, police in England and Wales killed 55 people in the past 24 years, while law enforcement in the U.S. killed 59 people in the first 24 days of 2015.
According to The Counted, an online database maintained by The Guardian, U.S. police killed 1,139 Americans in 2015.