Hmm. In the absence of something like bodycam footage, difficult to prove beyond a reasonable doubt that there was anything more than a communications screwup going on here. Not pressing charges was probably the correct decision. That doesn't mean there was no wrongdoing (or that there was), just that hauling it into court with no chance of a conviction wouldn't have helped anyone.
The main lesson to be taken from this is that you probably shouldn't run off into the woods in winter without the correct clothing and equipment no matter who or what is chasing you. Ultimately, that's what killed this guy.