She originally won the bronze medal in the 60 meters at the 1999 IAAF World Indoor Championships, but she tested positive for excessive caffeine after the race. Her results from the tournament were nullified and she received a public warning.
She was 1999 World 200m champion; 1999 World Champs 100m silver medalist; 1996 Olympic 4x100m relay gold medalist; 4x100m relay gold medalist at 1997 World Champs; 2003 World Outdoor 4x100m silver medalist.
Together with Jill Hawkins, Miller started Miller-Hawkins Productions, a full-service event coordinating company. The company currently operates out of offices in Altadena.