Barnes is running as an independent candidate in next week's general election, while Kozak is the GOP nominee. Democrat Jess Fresquez is also on the ballot.
Kozak said "You people out there, the citizens, you're getting ripped off. You're getting your cars stolen, your catalytic converters cut off. And it's happening in epidemic proportions."
Kozak joins a field of declared candidates that already includes long-time Sheriff's Office stalwart Don Hollingshead, as well as Patrick Long and James Barth.