[Blood of Tyrants]

Yes, I agree that there are potentially more options that a police officer on the ground has, but sometimes the police officer doesn't have time to implement those options.

Unlike ordinary citizens, police have no obligation to withdraw from a situation before it becomes deadly if there is no apparent threat to our or another person's life. The question is whether the guy advanced towards them in a threatening manner. If he simply stood there wit the box cutter in his hand and was shot, then it can be argued that he may have surrendered peacefully in a few minutes. However, if he moved towards them while they were yelling to drop the box cutter, the cops were right.

[GrandEagle]

Unlike ordinary citizens, police have no obligation to withdraw from a situation before it becomes deadly if there is no apparent threat to our or another person's life. The question is whether the guy advanced towards them in a threatening manner.
Again, you have a point. Not only are they not obligated to withdraw, they can't withdraw in a situation like this.
Off to work - re-thinking my position.