 The team was then disqualified.Stewart finished fourth in the 60 m at the World Indoor Championships in Paris, his time 6.55 s.

In the February Stockholm Indoor Meeting Stewart finished fourth in 60 m heat two, in 6.74 s. He failed to advance to the final

At the Sevilla World Championships Stewart finished fourth in heat three, running the anchor leg for the Jamaican 4 × 100 m team, in 38.86 s. The time was not good enough for advancing to the final.On 13 April 2008 the "New York Times" published an article in which Stewart was implicated by Angel Guillermo Heredia for the use of human growth hormone.