Discuss the responsibility of the police in the man's death and their actions leading up to it.
It doesn't get much more disgusting than this. A man is stabbing HIMSELF, indicating, shall we say a failure of the cognitive function and he fails to respond to commands. So he must be held responsible- but he is clearly not responsible.    
This man was murdered  and until clowns like these cops are charged this American style, wild west mentality will not change.