Mo Farah has lied at least twice to authorities Athletics Illustrated Magazine BBC will air a new documentary investigation into Mo Farah & his former coach Alberto Salazar on Monday Here's a bit on USADA investigating Farah & Salazar's use of L carnitine (legal supplement Mo Farah admitted performance enhancing supplement use minutes after denying it, says leaked Salazar probe report Four time Olympic champion Mo Farah lied about taking controversial supplement L carnitine before the 2014 London Marathon. : r olympics In 2015 US Anti Doping Agency investigators interviewed UK Athletics officials and Sir Mo Farah in London. , Asked multiple times whether hed had injections of the legal supplement L carnitine ahead What are your thoughts on 4x Olympic Champion, Sir Mo Farah? : r olympics