Which still caused unnecessary problems for the person being wrongly or falsely accused.
False accusations generally have that effect.
Had proper due process been followed, it should have prevented the claims from being acted upon before things went as far as they did.
You mean in regard to Stephen Nichols, as that does not apply to Susan Holmes.
That is the point of concern for some people because they see that due process, presumption of innocence, has failed in these instances
It did not "fail" in either instance you sited. Quite the contrary, both instances were examples of due process in action. That's the "process" part. In Nichols' case, a report was filed with the local police department that he was allegedly planning on shooting up the school he worked for. That, of course, is a VERY serious accusation given by someone--in this case a waitress--who had zero motive to lie and, in fact, did not lie, she just heard what he said incorrectly.
Regardless, the very first step the
police did and should take is to arrest him and confiscate his weapons. Police do NOT operate under "innocent until proven guilty," the courts do. Police operate under the rule of "is there sufficient evidence to act/get a warrant." In this case, a worker in a restaurant--having no motive or relationship with the accused--evidently overheard what she thought was someone planning on killing children.
She reported what she heard to the police. The police decided she was a credible witness and evidently got a search warrant whereupon they discovered numerous guns in his home. What type of guns, we don't know. I can't find the police report online anywhere and numerous sources (almost all biased, right wing/pro-gun sites no less) affirm that the local police have not released the report.
So, for all we know, the guns they took and gave to his grandson were ones he wasn't allowed to own to begin with, perhaps having something to do with the fact that he's 84.
Not to mention the effect it has on the person being falsely accused, who may have just made a casual comment in a cafe or to a co-worker. Which is far too flimsy a reason to act upon.
Not necessarily for the police. Again, from their perspective, they had a reliable complaint from a disinterested party in regard to an old crossing guard threatening to shoot school children under his care. Whatever steps they took next led them to discover the crossing guard had numerous weapons in his possession, thus corroborating--in a big way--that Nichols could, in fact, have been planning to murder children.
They took cautionary steps accordingly, gave the weapons they found to his grandson while the investigation continued; discovered that the waitress was not lying, but simply misheard what Nichols had said and in short order Nichols was reinstated in his job. As to the fate of his weapons, that's still not clear, nor is the exact reason why they were given to his grandson to sell (other than the fact that he is evidently a licensed arms dealer).
I think you are mistaking what standards/procedures police act upon and what the court system acts upon. When you get to the stage of prosecution and trial, you are presumed innocent until the State can prove that you are guilty in a court of law. You are NOT presumed innocent in the same manner during a police investigation. Cops think you did the crime and they try to find evidence that would prove it. They don't just dismiss every complaint with, "Well, it doesn't matter what you claim he did, he's presumed innocent so....want a donut?"