That video makes me sick; I regret watching it.
For 14 years I've taught a class with moderate to severe students in special education. I've worked with quite a variety of teenagers with different needs over the years…schizophrenia, the full spectrum of autism related issues, the severely emotionally disturbed (including aggressive/violent outbursts), and students that are generally so low functioning that they are hardly aware of their actions or their consequences.
When one of these kids is having a bad day, the worst possible response would be to have a stranger start giving them orders. Let alone a group of armed, aggressive ones. (And I'm not slighting the cops here, I understand the need to be aggressive and the reasons they speak and act the way they do). I've calmed down quite a few tense and violent outbursts in my time that I'm afraid, if the police were involved, would've ended in someone getting seriously hurt or killed.
It's a recipe for disaster; throwing gasoline on a fire. It's precisely how someone initially suspect of the minor and nonviolent infraction of "illegal camping" (AKA homelessness) ends up shot multiple times, bean bagged, bit by a dog, cuffed, and dead. It happens quite a bit in our society if you're paying attention or know where to look.
This whole thing is nothing but an indicator of the absolute failure (or non-existence) of social welfare systems and how the police end up picking up the slack in far too many cases. People end up out on the streets with absolutely no help or support, left to have an outburst or commit a crime before they receive "help", which usually involves handcuffs, not doctors. I'd wager this guy needed support, a social worker, and a doctor far more than men in body armor with AR15s and an eviction notice.
Now plenty of people will write off incidents like this to the idea that we can't help everybody, question where his family was, state that it's all about personal responsibility, say that this guy had it coming, and argue that many of these people "don't want help". Yet those things are real easy to say when you're not the parent, family member, caregiver, or simple advocate for a person, regardless of age, that has little control over their behavior. Imagine the horror of seeing armed and armored men show up in response to an irrational outburst by someone you know and care about, knowing full well that they have no idea who the person is, what sets them off, or how to handle them. This happens all too often with the mentally ill in this country. Once ties are broken with family and any formal institutions, which too often is at age 18, are mentally ill people seriously expected to self report? I've also noticed throughout the years that people will go to great lengths to help minors with mental issues, but tragically, have little sympathy for adults with the same issues. Though your condition hasn't changed (or has even possibly worsened), funding and support mysteriously dry up pretty quickly once you're an adult.
When I see disheveled and lost people roaming our streets, I'm tragically aware that I'm looking at the future of a percentage of the students I teach and love. I've already seen it happen. And I cringe when I think that their only interaction with our society's institutions at that point will likely be one between them and a police officer…and likely one with their hand on a weapon (and I don't blame police for worrying about their own safety when dealing with unstable people).
Our society is putting both the mentally ill and the police in impossible and unreasonable situations where a positive outcome is often doomed from the start. Though it only took a second to shoot him to death, I suspect the incident in that video was years in the making.