[3] On 25 February 2012, during the 2012 FAZZA International Powerlifting Competition in Dubai, one of Siaffa's urine samples tested positive for a substance prohibited by the World Anti-Doping Agency.

While Siaffa initially faced the potential of a two-year sanction for the positive test, two factors reduced the sanction to three months instead: the fact that Siaffa had included information about the use of a painkiller he had taken on his doping control form and a letter from his pharmacist, explaining that he was prescribed the painkiller which was thought to be allowed to treat a dislocated shoulder.

The letter alleged that while he was willing to compete in the Paralympics in Rio that year, he was uncomfortable with the leadership of the LNPC, and had faced verbal abuse among other poor treatment at their hands.

Liberia did not end up competing in the 2016 Paralympic Games, as the government was unable to provide the funds for the trip.

[6] Siaffa initially planned to compete in the 2018 World Para Powerlifting African Championship in Algiers, but a minor wrist injury he received when getting off the plane to Algeria prevented him from doing so.