Richardson failed the drug test at the U.S. Olympic track and field trials in Eugene, Oregon, on June 19, the day of her victory in the women's 100m, the U.S. Anti-Doping Agency (USADA) confirmed in a statement.

"The rules are clear, but this is heartbreaking on many levels; hopefully, her acceptance of responsibility and apology will be an important example to us all that we can successfully overcome our regrettable decisions, despite the costly consequences of this one to her