Dallas County Sheriff Lupe Valdez speaks during the final day of the Democratic National Convention in Philadelphia on July 28.
Dallas County Sheriff Lupe Valdez speaks during the final day of the Democratic National Convention in Philadelphia on July 28. J. Scott Applewhite Associated Press archives
Dallas County Sheriff Lupe Valdez speaks during the final day of the Democratic National Convention in Philadelphia on July 28. J. Scott Applewhite Associated Press archives