He was tested positive for methylhexanamine , 1 , 3 - Dimethylbutylamine and higenamine , substances prohibited by WADA .
May 22 -- Kiefer Ravena was suspended by FIBA for 18 months to compete in all FIBA - sanctioned competitions .
Kiefer Ravena was tested positive for methylhexanamine , 1 , 3 - Dimethylbutylamine and higenamine , substances prohibited by WADA .
May 22 -- Kiefer Ravena was suspended by FIBA for 18 months to compete in all FIBA - sanctioned competitions .