Brazilian jiu-jitsu black belt Marcel Goncalves has admitted to sexually assaulting a minor.

Gonclaves assaulted a 17-year-old girl at his home and at his gym. When police caught up to him at a tournament, he admitted to it.

Keith Rummel, the owner of the gym where Gonclaves worked and where he assaulted the girl, told Wink News that he was shocked by what happened:

I was shocked. We all were shocked. Nobody would ever thought that Marcel would do something like this. Everybody’s really close and taken back by it, and I just can’t believe that this has happened.

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Gonclaves is a black belt under Roberto Cyborg Abreu. He is a Pan-American No-Gi Brown Belt Champion.