Mark Napier won the Republican nomination for Pima County sheriff Tuesday and will take on eight-term incumbent Democrat Clarence Dupnik.

With 99.9 percent of the precincts counted, Napier had 43.3 percent of the vote, with Terry Frederick a distant second at 15.8 percent.

Mark Napier wins the Republican nomination for Pima County Sheriff on August 28, 2012.

In other Pima County races, one Republican won his seat and another earned a spot on the general election ballot for the Board of Supervisors.

In supervisors' District 1, Republican Ally Miller won a four-way race with 37.8 percent, ahead of Mike Hellon, at 31.8 percent. The winner will face Democrat Nancy Young Wright, a former state legislator who was unopposed in the primary.

Republican Ann Day is retiring after three terms on the board, leaving the seat open.

In District 4, incumbent Republican Ray Carroll won his seat again with 57.5 percent of the votes to 42.4 percent for challenger Sean Collins. Al but a few votes had been counted. Carroll will keep the seat he has held since 1997, because he is unopposed in the general election.

In supervisors' District 2, Democratic incumbent Ramon Valadez will face Republican James Kelley in the general election, Both were unopposed in Tuesday's primary.

In District 3, Democratic incumbent Sharon Bronson will face Republican challenger Tanner Bell in the general election, after both were unopposed in the primary.

In District 5, Democratic incumbent Richard Elias will face Republican Fernando Gonzales after both were unopposed in the primary.

In another contested county race, incumbent Republican county Schools Superintendent Linda Arzoumanian was on her way to another term, with 54.3 percent of the vote over challenger Mace Bravin, at 45.4 percent. Arzoumanian is unopposed in the general election.

In the sheriff's race, Dupnik faced no primary election opposition. He was appointed sheriff in 1980 and won election later that year and every four years since.

The Republican candidates spent a good share of the primary campaign criticizing Dupnik and calling for a change.

The GOP challengers were Napier, Frederick, Vinson Holck, Chester Manning and Walt Setzer.

All called Dupnik soft on illegal immigration and criticized him for his remarks on Jan. 8, 2011 following the Tucson shooting at a Congress on Your Corner event.

Your Vote 2012: The AZPM Election Center