Riley continued to sweep all before her in 1995, but arrived for the 1996 Summer Olympics under the cloud of a doping controversy. She had failed a drug test, and was only exonerated after her coach Scott Volkers admitted to giving her a headache tablet which contained the banned substance. Under the pressure of the controversy, Riley performed well outside her personal best times, which would have been enough for gold. She collected a bronze in the 100m breaststroke. She also collected a silver medal in the 4x100-meter relay with Nicole Stevenson, Susie O'Neill and Sarah Ryan.
