An NBC Bay Area Investigation has uncovered thousands of California voters who remain on the voter rolls despite having died several years ago.

That discovery prompted several state and Bay Area election officials to re-examine their records, after our investigation brought this issue to light.

NBC Bay Area used the Social Security Administration’s Death Master File to cross reference with the California state voter rolls using name, date of birth, and similar zip codes to find matches. We found over 25,000 questionable names still on the state voter rolls.