Oar...mods don't "get rid" of people because they are suicidal. =|
Nor is there anything a moderator can do to prevent suicide.
We don't know where people live and can't send EMT's to their homes.
The best thing to do in a situation like this, is to continue to try to talk to the person and have others talk to them as well, IF the person is open to the idea. Someone who is truly suicidal may not want to talk to just anyone about the issues.