How to Report people who are a danger to players.

I had an enemy player in a Bronze who literally told my duo to slit his wrists and kill himself and my duo is mentally unstable and actually was talking about it for hours and I really just want to get rid of him because if I wasn't there for my friend, he probably would have killed himself because he is that unstable. Is there anything we can do about it past reporting him. The guy admitted to being a Heimerdinger smurf and I'm worried about what would happen if he was saying those things about killing yourself to people who didn't have someone to talk them through it.
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