should the cop really legally shot the fugitive? [David Sweat]

Use of force rule are similar but not exactly the same from state to state. I don’t know the exact wording in NY (and more importantly, how they have been interpreted) but here is what the NJ Attorney General’s guidelines are on the subject:

A desperate convicted murderer would fall within the rules. An escaped burglar would not.

That is speaking in general terms. I don’t know exactly how it went down in this case.