On a moral ground maybe, but I looked it up and it seems the only persons that are responsible to report a suicidal person are medical professionals. And I can see why. A regular person can always claim they didn’t take the individual seriously and thought they were trying to get attention or have always made these threats. Even if the person has the means to do it, it doesn’t mean anything. Anyone at any time can jump out a window to their death.
Teens can be so dramatic. I had a friend years ago who threatened to kill herself every time her boyfriend threatened to leave. Well, he broke up with her and stayed alive for years and had many boyfirends after that.
So my point is how do you really know? People say things they don’t mean all the time.
But murder isn’t quite the same thing.
To murder, I would think you have to be actively involved in the death in some way. Bought the materials for the person to commit suicide or provoke a mentally unstable person to do such an action and even give them ideas on how to do it.
But in this case, if a person is already on death row then I don’t see how it’s murder if the person merely knew about it.
But again, morally and legally are two different animals.
Simply knowing about something that may or may not happen isn’t murder.