Boone County MO is a rare island of blue in a sea of red. It is dominated by a Democrat "machine" and many elections have no Republican challenger at all.
This one did.
https://www.columbiatribune.com/story/news/politics/2020/10/27/missouri-election-boone-county-sheriff-dwayne-carey-faces-deputy-charles-blair/3741914001/
Excerpt is from the linked story. Incumbent could not be reached for an interview on why he should be granted his FIFTH four year term as Sheriff.
DS200 voting machines WERE used in this election.