Coach fired

Gatlin fires coach caught in doping sting

An investigation published by Britain's Telegraph newspaper, using journalists pretending to be making a film, approached Mitchell and an agent linked to Gatlin, Robert Wagner.

The Telegraph claims Wagner offered to "supply and administer testosterone and human growth hormone for an actor training for a film," to reporters for a fee of $350,000.

And the matter is now the subject of an investigation by the United States Anti- Doping Agency (USADA) and the Athletics Integrity Unit (AIU), according to the Telegraph and the Press Association.