Interesting how the goosestepping apologists for police shootings easily disregard the premise that being scared or even "extra careful" is neither a necessary nor sufficient humane justification for shooting the unarmed or the mentally ill.
Given that shootings of the unarmed mentally ill account for about 0.001% of police shootings, that has little bearing on general phenomena of high rates of police shootings by US cops, where lists of 1200 "killings" by cops per year are posted as evidence of police racism and murderous out of control incompetence.
In addition, nowhere have I stated that shootings of unarmed mentally ill persons are humanely justified. The fact that there are others who share your disdain for reasoned thought but hold an opposite blind faith doesn't make your stance any more rational. Also, since you have a well demonstrated lack of understanding of the difference between understanding the actual psychological causes of an event and making a moral judgment about it, let me point out that even in the case of shooting of the unarmed mentally ill, a rational approach to understanding it would include not viewing the event in a psychological vacuum but within the psychological context that cops are in as created by the everyday threats they encounter, which include armed mentally ill people, armed not mentally ill people, people who seem unarmed but are, and people seem easy to overpower but are not and can get ahold of the cops gun if the cop allows them to make physical contact.
People like yourself, lacking any empathy for those who don't suit your political agenda, ignore all of that context that non cops and cops outside the US do not have to deal with, judging the encounter with a seemingly unarmed mentally ill man from your safe bubble-surrounded cushy armchair as though the cops reaction should be that of a person without any of their experiences and with certainty that there is no gun or no chance of being overpowered.
Understanding how that context impacts reactions doesn't mean that reaction can't also be excessive, something we should try harder to reduce, and even criminally incompetent. But that understanding (not excuse making) does help to avoid baseless moronic conclusions about the cops just being racist, looking to kill someone, equatable to a pre-meditated murderer, or devoid of regard for people's lives, black or otherwise, when in most cases protecting lives is the main motive behind their aggression, even when their psychological state driven by experiences make them sometimes over-zealous in that goal.