Also they clearly didn't take this guy seriously since he was yelling, "They want to kill me!" before they even touched him. They probably thought he was crying wolf. Better training would mean they wouldn't have used an illegal hold and killed him, they'd probably have taken him seriously if they knew the dangers at that particular moment in time...plus with better training over a long enough period of time people wouldn't be as scared of the cops in the first place so there wouldn't be any miscommunication. It's still clearly the fault of modern policing but you can understand why it happened at least. Super tragic.