I had a cousin who did something similar about 10 years ago - albeit from the top of a cliff rather than stepping in front of a train. Hate to think what Joe went through, and all thoughts to his family.
Immensely sad. I RTd the Twitter post looking for Joe and many of the parents at my son's school had shared the FB search. I have seen his face all day yet sadly it was already too late. My condolences to the OP, to Joe's family and all his friends. Mental Illness is horrible and badly misunderstood by many.