That is not an unreasonable thing to advocate. Basically, right now cops don't have to be right when they kill someone. They only have to suspect something to be justified in ending a life. Over decades, that has created this mess of a situation where they shoot first and ask questions later particularly with blacks and latinos. Maybe if for some time we changed things where cops are judged by being right (ie if you suspected something, killed someone and was wrong, the cop gets punished hard), we'd see different policing practices. If you don't want cops to shoot in a cavalier fashion, change the incentives. Right now the incentive is to shoot.
I'll make my one comment here in response to this particular remark.
As clarification, ordinary citizens don't "have to be right" either when they use force to defend themselves.
The law of self-defense which applies to ordinary citizens also applies to police. Some people get confused when they talk about police being "privileged to use force" under certain circumstances. However, that refers to non-lethal uses of force, like restraining someone during an arrest, which would be assault and/or false imprisonment if done by one citizen toward another. This may become relevant, as it is in the Chauvin trial, when an unintended death occurs.
For deadly force, however, the privilege exists only where it would also exist for a citizen. It is the law of self-defense. There are no special legal rules for police.
The law of self-defense is this: You can use deadly force if you have a reasonable belief in an imminent threat of deadly force from the victim.
Reasonableness is not judged by hindsight. That is why it says "reasonable" and not "correct."
I will not attempt to apply this law to the facts of this particular case. I only wanted to intervene because practically no one seems to understand that the law in this area is the same for cops as citizens, and it's actually pretty simple what that law is.
I've also noticed one or more people suggesting that police should not be able to shoot in situations where an ordinary citizen would likely be allowed to under the law.