He had used a different inhaler to control his asthma than the one for which he had been granted a therapeutic use exemption .
MacLeod was under investigation eight months ago having tested positive for a banned substance .
MacLeod had used a different inhaler to control MacLeod 's asthma than the one for which he had been granted a therapeutic use exemption .
MacLeod was under investigation eight months ago having tested positive for a banned substance .