What if a majority of taxpayers voted for that sheriff?
Recent history has shown that sometimes people will vote for incompetent criminals but, elected or not, that doesn't mean we shouldn't still hold them accountable for what they do.
Being elected by a majority doesn't negate crimes committed, as much as a certain president would love everyone to believe that. Being elected shouldn't have anything to do with being punished, whether they won by 1% or by 99%
Another huge problem with our times is that local media is completely hollowed out. Voter awareness was never amazing but now there is no local paper to highlight abuse or corruption. Every problem becomes a national problem with no accountabillity. Lots of people in the state I live in vote for their sheriff. I would be shocked if one in one hundred even knew who that was.