Disturbing status

So, I've been on league for a while, and when ur on so much, you tend to see things right? A player on my friends list keeps putting suicidal posts, and I'm at a loss on what I'm supposed to do. I mean, where do we submit such a problem? Are we supposed to just let them put on a suicidal status? Is it even Riot or our place to do something? I don't know, all I know is that it's been on his status for quite some time, and it kind of disturbs me that tons of people see his status and do nothing. If something does come to this, will riot be one to blame? Or would it be thrown on the people that decided not to say anything? Idk, all I know is that I have a sized heart for people in need but I aint no when it comes to policies, because maybe there is one that covers this. ty ty ty for ur responses