According to Kat Saks for DMV.org, some counties offer arrest warrant searches. The sheriff's department might have an online search tool for checking open arrest warrants.
Some counties do not offer online search tools; if you cannot find one, it is best to contact the county directly to find out. Third-party websites offer background checks for a small fee. A background check can reveal open warrants, dates, descriptions and case type and any fines associated with the case, notes Saks. To find out this information, you need the following: full name, city and state, and the approximate age of the person.