Just clarify the situation in which the police officer shot.
https://en.wikipedia.org/wiki/Shooting_of_Daniel_Shaver
According to a police report, Daniel Leetin Shaver (December 29, 1989 – January 18, 2016), a pest-control worker and resident of Granbury, Texas, had been staying at a Mesa La Quinta Inn & Suites on business. He invited two acquaintances to his room for drinks. There he showed them a scoped air rifle he was using to exterminate birds inside grocery stores. At one point the gun was pointed outside his hotel window, prompting a witness to notify the front desk; the police were immediately called. Upon arrival, police gave Shaver and his acquaintance's detailed orders for several minutes, with frequent admonitions that failing to comply with them would get them shot.[3]
Eventually, Shaver was ordered to crawl on the floor towards them. While complying with their request, Shaver, who was intoxicated and could be heard sobbing, begging officers, "Please don't shoot," brought his hands toward his waist. Police Sergeant Charles Langley yelled at Shaver that if he did anything that deviated from his instructions he would shoot him and he probably would not survive. The officer told Shaver to put his hands up in the air and not to bring them down for any reason. A few seconds later, the officer ordered Shaver to crawl towards him, to which Shaver complied. Shaver then reached his right hand back towards his waistband, at which point Langley can be heard yelling "Don't!" while Officer Phillip Brailsford simultaneously opened fire with his AR-15 rifle, striking Shaver five times and killing him almost instantly. Shaver was unarmed.
So what is the chain of events that lead to his death?
1. Bringing out a scoped air rifle in a place where firearms are not normally seen.
2. Pointing that air rifle out a window, causing a witness that didn't know it was a air rifle to call the police.
3. When the police arrive, they ask if he's drunk. He replies NO. Though he clearly is drunk, yet unable to admit to the police with firearms trained on him that he is.
Keep in mind, the officer speaking and the officer that fires on Shaver are 2 completely different people.
Police Sergeant Charles Langley is the person yelling at Shaver in the video.
Officer Phillip Brailsford is the one that opened fire.
From that point on it was simply a shit show that lead to Shaver being shot.
The police were thinking they were dealing with a dangerous armed idiot.
Shaver was drunk and unable to clearly follow orders or keep his hands exposed without reaching for his back.
To sum things up. The police are not best people in dealing with stupid.