eben kaneshiro , 35 , found dead at deschutes county adult jail on sunday .
kaneshiro was the owner of new breed jiu-jitsu in portland , oregon .
charged with three counts each of first-degree sodomy and sexual abuse .
was arrested last week and accused of molesting boy under the age of 12 .
mma fighter was a brazilian jiu-jitsu black belt with 31 fights since 2002 .