A look at the four candidates running for sheriff,

Sally Hernandez,

58, is a Democrat who is finishing her first term as Travis County Precinct 3 constable. As constable, she promoted neighborhood watch programs and partnered with schools on deputy constable patrols. Hernandez previously spent 21 years as an investigator at the Travis County district attorney’s office. She grew up in Llano and got her degree in criminal justice from St. Edward’s University. She moved to Austin in 1988.

Joe Martinez,

71, is a Republican who is a licensed private investigator. He is co-owner and lead investigator for Austinbased CM Investigations, which conducts investigations for attorneys in indigent defense cases. Martinez has 34 years of law enforcement experience, including stints with the Travis County sheriff ’s office, the Texas attorney general’s office and 18 years as an investigator at the Travis County district attorney’s Office. He grew up in East Austin.

Debbie Russell,

48, is the Green Party candidate. She is the executive director of the Pecan Street Association and a member of the Del Valle school district board. She also volunteers for the American Civil Liberties Union-Texas focusing on police accountability and open government. Russell grew up in Houston, where she got a degree in English literature from the University of Houston. She moved to Austin 19 years ago.

Eric Guerra,

26, is a Libertarian who is a full-time student studying government at the University of Texas. He grew up in Elk Grove, Calif., and moved to Austin in 2008. He is the treasurer of the Travis County Libertarian Party and has been a delegate at state and national conventions for the party since 2014.