Welcome, Ryan. You really can't stop someone if that is what they are determined to do. I don't believe anyone can be held legally responsible unless you help them do it. For a lot of people the thought of suicide is like a last resort, an escape plan in the back of their mind, but don't really intend to do it, or keep delaying it. Others come to a point where they see no other option. It is my opinion that those who really want to, do it, and someone who reaches out for help does not really want to. I put it this way: One might think that is the only choice, whether now or later. But, if you are faced with a life threatening situation (Illness, crime, injury) almost all of the time your survival instinct kicks in and you will do anything to live.

It's been said that if someone says they want to do it to take them seriously, and you should. You can only help them so much and it is their own responsibility to seek professional help. It is a terrible feeling that you can't help them, and if they do it, it is normal to feel some guilt. But ultimately it is not your fault, and you certainly didn't want it to happen.

There are those who use threatening or wanting to commit suicide to seek attention. Again, I'd take them seriously, but advise them to get professional help. If someone really wants help, they will get help.