Seems like a lot of people end up dead following a police "welfare check".
Kind of the nature of the call, I believe. When you don’t get ‘officers’ like this one blowing reasonable policy and then blowing away homeowners without justification, even legitimate welfare checks can be hazardous. Often people that have dropped out of contact with family or close friends enough that they are worried enough to call in for a welfare check are suffering from mental illness. Some of them will then attack the officers.
Fortunately there are now bodycams that can help exonerate police when this happens. (There are unfortunately more than a few videos posted on the internet where you can watch an officer be attacked for no good reason while performing a welfare check.) Or, as in this Johnson shooting, correctly convict miscreants with badges.